WO2021100123A1 - Endoscope - Google Patents

Endoscope Download PDF

Info

Publication number
WO2021100123A1
WO2021100123A1 PCT/JP2019/045284 JP2019045284W WO2021100123A1 WO 2021100123 A1 WO2021100123 A1 WO 2021100123A1 JP 2019045284 W JP2019045284 W JP 2019045284W WO 2021100123 A1 WO2021100123 A1 WO 2021100123A1
Authority
WO
WIPO (PCT)
Prior art keywords
protrusion
wall surface
lid member
tip
recess
Prior art date
Application number
PCT/JP2019/045284
Other languages
French (fr)
Japanese (ja)
Inventor
佳紀 長尾
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to PCT/JP2019/045284 priority Critical patent/WO2021100123A1/en
Priority to JP2021558077A priority patent/JP7245357B2/en
Publication of WO2021100123A1 publication Critical patent/WO2021100123A1/en

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments

Definitions

  • the present invention relates to an endoscope including an insertion portion to be inserted into a subject.
  • Some endoscopes have a movable member at the insertion part.
  • Japanese Patent Application Laid-Open No. 2007-136044 discloses an endoscope having a standing lever and a standing stand, which are movable members, at an insertion portion.
  • the standing lever is arranged in the lever accommodating portion which is a concave space formed in the main body of the tip portion of the insertion portion. Then, in the endoscope disclosed in Japanese Patent Application Laid-Open No. 2007-136044, the lever accommodating portion is closed by a thin plate-shaped cover.
  • the lid member when the fixing resin is poured into the gap between the lid member and the wall surface portion, the lid member may fall off from the base portion, and it is difficult to fix the lid member to the base portion.
  • the present invention solves such a problem, and an object of the present invention is to provide an endoscope having improved workability when fixing a lid member to a hard member arranged at the tip of an insertion portion.
  • the endoscope includes a hard member arranged at the tip of an insertion portion of the endoscope, a lid member covering a part of the hard member, and a length of the insertion portion provided on the hard member.
  • a first wall surface having a plane along a direction intersecting the axis, and a second wall surface provided on the lid member and facing the first wall surface when the lid member covers a part of the hard member. It includes a protrusion provided on one of the first wall surface and the second wall surface and projecting toward the other, and a recess provided on the other side of the first wall surface and the second wall surface into which the protrusion fits.
  • FIG. 5 is a sectional view taken along line VV of FIG.
  • FIG. 4 is a sectional view taken along line VI-VI of FIG.
  • FIG. 5 is a sectional view taken along line VIII-VIII of FIG.
  • FIG. 4 is a cross-sectional view taken along the line XI-XI of FIG. It is sectional drawing of the lid member and the 2nd arm part along the longitudinal axis which concerns on embodiment of this invention. It is a perspective view seen from the outer surface side on the opposite side of the contact surface of a lid member which concerns on embodiment of this invention. It is a perspective view seen from the contact surface side of the lid member which concerns on embodiment of this invention.
  • FIG. 5 is a cross-sectional view showing a state in which a part of the protrusion of the lid member according to the third modification of the embodiment of the present invention is inserted into the recess.
  • FIG. 5 is a cross-sectional view showing a state in which a protrusion according to a modification 4 of the embodiment of the present invention has entered a recess.
  • FIG. 5 is a cross-sectional view showing a state in which a protrusion has entered a recess when the lid member does not have a cut surface, according to a modification 4 of the embodiment of the present invention.
  • FIG. 1 is a diagram showing a schematic configuration of the endoscope 100.
  • the endoscope 100 of the present embodiment includes an endoscope main body 1 and a tip cover 60.
  • the endoscope 100 is an endoscope having an insertion portion 2 to be inserted into the human body as a subject, and more specifically, a side-view type duodenal endoscope. ..
  • the endoscope main body 1 includes an insertion portion 2 to be inserted into the subject, an operation portion 3 provided on the base end side of the insertion portion 2, and a universal cord 4 extending from the operation portion 3. It is configured.
  • the operation unit 3 is provided with a bending operation device 11, an air supply / water supply button 12, a suction button 13, a riser operation lever 14, and an operation switch 15.
  • the operation switch 15 is an electronic switch for operating the image pickup device 42 (not shown in FIG. 1) provided in the insertion unit 2.
  • the operation unit 3 is provided with a treatment tool insertion port 16 for introducing a treatment tool (not shown) into the body.
  • the base end side of the channel tube 17 is connected to the treatment tool insertion port 16.
  • the tip end side of the channel tube 17 is open at the tip end portion 5 of the insertion portion 2.
  • the insertion portion 2 connects the tip portion 5 disposed at the tip, the bendable curved portion 6 disposed on the proximal end side of the distal end portion 5, and the proximal end side of the curved portion 6 and the operating portion 3.
  • Flexible tube portions 7 are connected and configured.
  • a tip cover 60 is attached to the tip portion 5. Details of the configuration of the tip portion 5 and the tip cover 60 will be described later.
  • the curved portion 6 is curved upward or downward according to the rotation of the vertical curved knob 11a of the curved operating device 11 provided in the operation unit 3, and is curved leftward or right according to the rotation of the left-right curved knob 11b. Curve in the direction.
  • a riser operating wire 18 (not shown in FIG. 1) is inserted into the insertion portion 2.
  • the riser operating wire 18 moves forward and backward in the longitudinal direction in response to the swing of the riser operation lever 14. That is, the raising table operating lever 14 is an operating member for the user to operate the device for pushing and pulling the raising table operating wire 18 inserted into the insertion portion 2.
  • the tip of the riser operating wire 18 is connected to a movable member 51 (not shown in FIG. 1), which will be described later, provided at the tip portion 5.
  • FIG. 2 is a perspective view of the tip portion 5. As shown in FIG. 2, a tip cover 60 is attached to the tip portion 5. The tip cover 60 is a sheath-shaped member that covers a predetermined outer surface of the tip portion 5, and is removable from the tip portion 5.
  • FIG. 3 is a perspective view showing the tip cover 60 and the tip 5 in a separated state.
  • the tip cover 60 is formed of a resin such as polyethylene or polypropylene, which has lower elasticity than rubber or the like and is easily plastically deformed or broken.
  • the tip cover 60 of the present embodiment is irreversibly deformed or broken when it is removed from the tip portion 5 after being attached to the tip portion 5, and cannot be reused.
  • FIG. 3 shows a tip cover 60 in a state (unused state) that has never been attached to the tip portion 5.
  • the axis along the longitudinal direction of the elongated insertion portion 2 is referred to as a longitudinal axis 2a.
  • the direction toward the tip end side of the insertion portion 2 along the longitudinal axis 2a is referred to as the tip end direction A
  • the direction opposite to the tip end direction A is referred to as the proximal end direction B.
  • two linear axes orthogonal to each other on a plane orthogonal to the longitudinal axis 2a are defined as an X axis and a Y axis.
  • the direction toward one side along the X axis is referred to as the right direction R, and the direction opposite to the right direction R is referred to as the left direction L.
  • the direction toward one side along the Y axis is referred to as an upward direction U, and the direction opposite to the upward direction U is referred to as a downward direction D.
  • the X-axis and the Y-axis are substantially parallel to the bending direction of the bending portion 6.
  • the right side when viewed from the proximal end side to the distal end side along the longitudinal axis 2a, when the X axis is horizontal, the right side is the right direction R and the upper side is the upward direction U.
  • FIG. 4 is a view showing the left side surface of the tip portion 5 in a state where the tip cover 60 is not attached. Further, FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is an exploded perspective view of the tip member 20.
  • the tip portion 5 includes a tip member 20 and an insulating portion 20j made of a resin or ceramic having electrical insulation.
  • the tip member 20 is a hard member made of metal such as stainless steel, and is a hard member arranged at the tip of the insertion portion 2 of the endoscope main body 1.
  • the tip member 20 includes a base portion 20a fixed to the tip end of the curved portion 6, a first arm portion 20b and a second arm portion 20c which are a pair of arm portions protruding from the base portion 20a toward the tip end direction A, and a first arm portion 20c. It has a riser accommodating space 20d, which is a space formed between the arm portion 20b and the second arm portion 20c.
  • the outer shape of the base 20a is substantially columnar.
  • the outer circumference of the base portion 20a is covered with an annular insulating portion 20j.
  • the first arm portion 20b and the second arm portion 20c are arranged so that the riser accommodating space 20d, which is a space formed between them, is opened toward three directions of the upward direction U, the downward direction D, and the tip direction A. Has been done. That is, the first arm portion 20b and the second arm portion 20c are arranged in the direction along the X axis with the riser accommodating space 20d in between.
  • the first arm portion 20b is arranged on the left L side of the riser accommodating space 20d
  • the second arm portion 20c is arranged on the right R side of the riser accommodating space 20d. ..
  • An illumination lens 41, an image pickup device 42, and a cleaning nozzle 43 are arranged on the upper surface of the outer peripheral surface of the first arm portion 20b facing upward U.
  • the illumination lens 41 is for emitting illumination light toward the subject of the image pickup apparatus 42.
  • the illumination light is guided from the light emitting device to the illumination lens through the optical fiber cable 41a inserted into the insertion portion 2.
  • the light emitting device may be arranged in the endoscope 100, or may be arranged in an external device connected to the endoscope 100.
  • the field of view of the image pickup apparatus 42 is generally centered on the upward direction U. That is, the image pickup apparatus 42 has a side view of the insertion portion 2.
  • the cleaning nozzle 43 is a portion that ejects a fluid toward the illumination lens 41 and the image pickup device 42.
  • an image pickup device accommodation space 20e is formed inside the first arm portion 20b.
  • the tip of the optical fiber cable 41a and the image pickup device 42 are arranged in the image pickup device accommodation space 20e.
  • the image pickup device accommodation space 20e communicates with the internal space of the curved portion 6 through a through hole 20f penetrating the base portion 20a.
  • the tip of the optical fiber cable 41a and the image pickup device 42 are inserted into the image pickup device accommodation space 20e through the through hole 20f.
  • the image pickup apparatus accommodation space 20e has an opening 20g that opens on the lower surface facing the downward direction D of the first arm portion 20b.
  • the opening 20g is closed by a plug body 20h that intrudes into the opening 20g.
  • the plug body 20h is fixed in the opening 20g by an adhesive.
  • the plug body 20h is formed with a claw 20i for hooking a tool when the plug body 20h is pulled out from the opening 20g at the time of maintenance of the endoscope 100, for example. ..
  • a storage space 22 in which the movable member 51 is arranged is provided in the second arm portion 20c.
  • the movable member 51 is a member that transmits the movement of the raising table operation wire 18 to the raising table 50.
  • the tip cover 60 is a sheath-shaped member that is closed on the tip direction A side and open on the base end direction B side.
  • the opening provided on the base end direction B side of the tip cover 60 is referred to as an insertion port 60d.
  • the tip cover 60 has an opening 60a that exposes the riser accommodating space 20d only in the upward direction U when attached to the tip 5. Further, in a state where the tip cover 60 is attached to the tip member 20, the illumination lens 41, the image pickup device 42, and the cleaning nozzle 43 are also exposed upward through the opening 60a.
  • the opening 60a is not connected to the insertion port 60d. Therefore, at the base end 60b of the tip cover 60, an annular portion 60e is formed in which the entire circumference is connected in an annular shape around the longitudinal axis 2a. When the tip cover 60 is attached to the tip member 20, the annular portion 60e fits on the outer circumference of the insulating portion 20j.
  • FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
  • FIG. 9 is a view showing the right side surface of the tip member 20.
  • FIG. 10 is a view showing the right side surface of the tip member 20 with the lid member 23 removed.
  • FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG.
  • FIG. 12 is a cross-sectional view of the lid member 23 and the second arm portion 20c along the longitudinal axis 2a.
  • the second arm portion 20c has a base portion 21 that is integrated with the tip member 20 and a lid member that is adhesively fixed to the base portion 21 by a fixing resin 26. 23 and.
  • the lid member 23 is fixed to the right side surface of the base portion 21.
  • the lid member 23 covers a part of the tip member 20.
  • the accommodation space 22 is composed of a first recess 21a and a second recess 23a, which are recessed on the surfaces of the base portion 21 and the lid member 23 facing each other, respectively.
  • the lid member 23 is a hard member made of metal such as stainless steel, similarly to the tip member 20 described above.
  • the base portion 21 includes a first recess 21a, an opening forming surface 21b, and a wall surface portion 21c.
  • the first recess 21a is a recess of the tip member 20 that is open in the opening forming surface 21b on the surface of the base portion 21. That is, the opening forming surface 21b is a surface formed so as to surround the opening of the first recess 21a.
  • the shape of the opening forming surface 21b is not particularly limited, and may be composed of, for example, a single plane, a plurality of planes, or a curved surface.
  • the opening forming surface 21b includes a pair of planes 21b1 and 21b2 arranged at angles substantially parallel to the longitudinal axis 2a and intersecting each other.
  • the pair of planes 21b1 and 21b2 face different directions on the surface of the columnar base portion 21 so that the line of intersection of the two planes becomes a ridge line that is convex outward.
  • the opening forming surface 21b including the pair of planes 21b1 and 21b2 has a mountain-shaped bent shape in a cross section orthogonal to the longitudinal axis 2a.
  • the wall surface portion 21c is erected from the opening forming surface 21b toward the outside of the base portion 21.
  • the wall surface portion 21c will be described later.
  • the lid member 23 is a member formed in a substantially flat plate shape for covering a part of the tip member 20, and includes a second recess 23a and a contact surface 23b. Further, the lid member 23 is provided with a protrusion 30A on the end face on the distal end direction A side and another protrusion 30B on the end face on the proximal end direction B side.
  • the contact surface 23b is a surface that contacts the opening forming surface 21b. Further, the contact surface 23b is larger than the opening of the first recess 21a and comes into contact with the opening forming surface 21b over the entire circumference of the opening of the first recess 21a. Therefore, when the contact surface 23b is in contact with the opening forming surface 21b, the opening of the first recess 21a is closed by the lid member 23.
  • the lid member 23 Since the outer peripheral portion of the second recess 23a, that is, the portion near the side surface 23d is thicker than the central portion where the second recess 23a is formed, the lid member 23 has a plate having the same thickness as the central portion. It has higher strength than that. The thickness of the outer peripheral portion of the second recess 23a may be designed to be sufficient for the required strength of the lid member 23.
  • the contact surface 23b has a shape that is in close contact with the opening forming surface 21b in order to close the first recess 21a. Specifically, in the present embodiment, since the opening forming surface 21b is bent in a mountain shape in a cross section parallel to the longitudinal axis 2a, the contact surface 23b is bent in a valley shape in accordance with the bending of the opening forming surface 21b. Has a shaped shape. That is, the contact surface 23b includes a pair of planes 23b1 and 23b2 parallel to the pair of planes 21b1 and 21b2 of the opening forming surface 21b.
  • the opening forming surface 21b on the base portion 21 side has a mountain shape and the contact surface 23b on the lid member 23 side has a valley shape
  • the contact surface 23b is brought into contact with the opening forming surface 21b.
  • the lid member 23 is positioned in the circumferential direction around the longitudinal axis 2a with respect to the base portion 21.
  • the circumferential positioning of the lid member 23 with respect to the base portion 21 around the longitudinal axis 2a is the positioning in the upward direction U and the downward direction D along the Y axis.
  • the second recess 23a is open in the contact surface 23b. That is, the circumference of the opening of the second recess 23a is surrounded by the contact surface 23b.
  • the second recess 23a is connected to the first recess 21a in a state where the lid member 23 closes the opening of the first recess 21a.
  • the accommodating space 22 has a base portion 21 and a lid so that the first recess 21a provided in the base portion 21 and the second recess 23a provided in the lid member 23 face each other. It is formed by adhering to the member 23. Therefore, on the side wall surface of the accommodation space 22, a boundary line between the base portion 21 and the lid member 23 exists at a position separated from the bottom surfaces of the first recess 21a and the second recess 23a.
  • the side wall surface of the accommodation space 22 is a surface of the inner surface of the accommodation space 22 excluding the bottom surfaces of the first recess 21a and the second recess 23a. That is, the side wall surface of the accommodation space 22 is composed of the side walls of the first recess 21a and the second recess 23a.
  • the boundary line means that the mating surface of the base portion 21 and the lid member 23, that is, the opening forming surface 21b and the contact surface 23b appear on the side wall surface of the accommodation space 22.
  • the mating surface of the base portion 21 and the lid member 23 is substantially parallel to the longitudinal axis 2a.
  • the wall surface portion 21c is erected from the opening forming surface 21b toward the outside of the base portion 21, and at least a part of the side surface 23d of the lid member 23 in a state where the contact surface 23b is in contact with the opening forming surface 21b.
  • the wall surface portion 21c of the present embodiment is arranged so as to surround the lid member 23 at a predetermined distance from the side surface 23d.
  • the wall surface portion 21c is a side wall surface of a recess formed on the surface of the base portion 21 and the lid member 23 is fitted inward, and the opening forming surface 21b corresponds to the bottom surface of the recess.
  • the wall surface (hereinafter referred to as the tip side wall surface) 21ca formed on the tip direction A side is formed with a recess 21c1d into which the protrusion 30A is fitted. That is, the wall surface portion 21c has a tip side wall surface 21ca.
  • the tip side wall surface 21ca is provided on the tip member 20 and is formed along a direction intersecting the longitudinal axis 2a of the insertion portion 2.
  • the surface on which the recess 21c1d is formed is a part of the peripheral edge surrounding the first recess 21a.
  • the first recess 21a is a recess provided in the tip member 20.
  • FIG. 13 is a perspective view seen from the outer surface 23f side on the opposite side of the contact surface 23b of the lid member 23.
  • FIG. 14 is a perspective view of the lid member 23 as viewed from the contact surface 23b side.
  • FIG. 15 is a cross-sectional view showing a state in which a part of the protrusion 30A of the lid member 23 has entered the recess 21c1d.
  • the lid member 23 has a substantially rectangular shape, and as shown in FIG. 9, has a cut shape portion 23x in which a part is cut off.
  • the first recess 21a of the base portion 21 has a shape corresponding to the shape of the cut shape portion 23x of the lid member 23. Therefore, in the base portion 21, the shape portion corresponding to the cut shape portion 23x becomes thick, so that the rigidity of the second arm portion 20c is increased.
  • the side surface 23d of the lid member 23 includes a pair of surfaces substantially parallel to the longitudinal axis 2a and a pair of surfaces substantially orthogonal to the longitudinal axis.
  • the side surface 23d is a part of the peripheral surface of the lid member 23.
  • the side surface 23d faces the wall surface 21c when the lid member 23 covers a part of the tip member 20.
  • the lid member 23 has a protrusion 30A and another protrusion 30B.
  • the protrusions 30A and the other protrusions 30B project from a part of the side surface 23d of the lid member 23 toward the wall surface portion 21c.
  • the protrusion 30A projects toward the tip side wall surface 21ca in the tip direction A when the lid member 23 is mounted on the base portion 21, and the other protrusions 30B are mounted on the base portion 21 by the lid member 23.
  • it protrudes toward the base end direction B. That is, when the protrusion 30A is provided on the tip member 20, the other protrusion 30B is provided on the surface of the lid member 23 opposite to the side surface on which the protrusion 30A is provided.
  • the protrusion 30A is formed so that it can be inserted into the recess 21c1d formed in the wall surface 21c1. As shown in FIG. 13, the protrusion 30A has a first protrusion 30A1 protruding from the side surface of the lid member 23, and a second protrusion 30A2 having a smaller protrusion amount than the first protrusion 30A1.
  • the length L1 along the side surface 23d direction orthogonal to the longitudinal axis 2a of the first protrusion 30A1 is longer than the length L2 along the side surface 23d direction orthogonal to the longitudinal axis 2a of the second protrusion 30A2.
  • the first projecting portion 30A1 includes a tip surface 30A1a in the projecting direction (tip direction A), an outer surface 30A1b on the outer surface 23f side, and an inner surface 30A1c on the opposite side to the outer surface 23f.
  • the recess 21c1d has an outer upper surface 21a1 of the tip member 20, a bottom surface 21a2 on the tip direction A side, and an inner lower surface 21a3 of the tip member 20.
  • the above-mentioned length L1 of the first protrusion 30A1 is longer than the above-mentioned length L2 of the second protrusion 30A2, and the amount of protrusion of the first protrusion 30A1 from the side surface 23d is the side surface 23d. It is larger than the amount of protrusion of the second protrusion 30A2 from.
  • the fixing resin 26 also enters between a part of the contact surface 23b of the lid member 23 and a part of the opening forming surface 21b of the tip member 20. Further, the fixing resin 26 also enters between the bottom surface 21a2 of the recess 21c1d and the front end surface 30A1a, and between the lower surface 21a3 and the inner side surface 30A1c of the recess 21c1d.
  • the operator assembling the tip portion 5 attaches the lid member 23 to the first recess 21a while the other protrusion 30B is in contact with the wall surface portion 21c on the base end direction B side. Fit inside.
  • the tip surface 30A2a of the second protrusion 30A2 abuts on the tip side wall surface 21ca on the tip direction A side, but the tip surface 30A1a of the first protrusion 30A1 is the first recess 21a. It is not pressed against the bottom surface 21a2 of. That is, the positioning of the lid member 23 in the tip direction A with respect to the first recess 21a is defined by the amount of protrusion of the second protruding portion 30A2 from the side surface 23d of the lid member 23.
  • the first protrusion 30A1 is formed so that the outer surface 30A1b of the first protrusion 30A1 comes into contact with the upper surface 21a1 of the recess 21c1d.
  • the inner side surface 30A1c of the first protrusion 30A1 is not in contact with the lower surface 21a3 of the first recess 21a. That is, the positioning of the lid member 23 in the outer direction of the tip member 20 and the adjustment of the surface positions of the outer surface of the tip member 20 and the outer surface 23f of the lid member 23 are performed on the outer surface 30A1b of the first protrusion 30A1 and the first recess. It is defined by the contact with the upper surface 21a1 which is the outer surface of the 21a.
  • the protrusions 30A and the other protrusions 30B have a wall thickness smaller than the wall thickness on the side surface 23d of the lid member 23. Therefore, as shown in FIG. 15, the protrusion 30A is separated from the contact surface 23b of the lid member 23 and the outer surface 23f on the side opposite to the contact surface 23b in the thickness direction.
  • the second protruding portion 30A2 provided on the lid member 23 is a positioning protruding portion that maintains the distance between the side surface 23d of the lid member 23 and the wall surface portion 21c of the tip member 20.
  • the other protrusion 30B has a cut surface 30Ba as shown in FIGS. 12 and 14.
  • the other protrusion 30B is brought into contact with the wall surface (hereinafter referred to as the base side wall surface) 21cc formed on the base end direction B side of the wall surface portion 21c while being brought into contact with each other.
  • the cut surface 30Ba is inclined so that the cut surface 30Ba approaches the tip direction A from the surface opposite to the outer surface 23f toward the longitudinal axis 2a so that the cut surface 30Ba can be easily fitted inside the first recess 21a.
  • the tip side wall surface 21ca and the base end side wall surface 21cc provided on the base portion 21 are arranged so as to sandwich the lid member 23 from both directions along the longitudinal axis 2a. Therefore, in the present embodiment, the tip surface 30A2a of the second protrusion 30A2 comes into contact with the tip side wall surface 21ca, so that the lid member 23 is positioned in the longitudinal axis 2a direction with respect to the base portion 21.
  • the clearance amount Lb in the longitudinal axis 2a direction when the lid member 23 is fitted inside the first recess 21a is substantially equal to the protrusion amount La of the first protrusion 30A1, but is cut. Since the surface 30Ba is provided, the lid member 23 can be fitted inside the first recess 21a.
  • Positioning of the lid member 23 with respect to the base portion 21 in the circumferential direction orthogonal to the longitudinal axis 2a is performed by bringing the contact surface 23b into contact with the opening forming surface 21b as described above. Therefore, in the present embodiment, when the lid member 23 is adhered to the base portion 21, the operator abuts the contact surface 23b on the opening forming surface 21b, inserts the protrusion 30A into the recess 21c1d, and then inserts the protrusion 30A into the recess 21c1d.
  • the lid member 23 is fitted inside the first recess 21a while the protrusion 30B of the above is brought into contact with the base end side wall surface 21cc, so that the lid member 23 is positioned on the surface of the base portion 21 in the direction of the longitudinal axis 2a. Is done.
  • a groove-shaped gap 27 is formed between the lid member 23 and the wall surface portion 21c surrounding the lid member 23.
  • the gap 27 generated around the lid member 23 is continuous along the outer circumference of the contact surface 23b of the lid member 23 without interruption.
  • the fixing resin 26 before curing is poured into the gap 27 formed between the lid member 23 and the wall surface portion 21c, and then the fixing resin 26 is cured to form a base.
  • the lid member 23 is adhesively fixed to the base portion 21.
  • the fixing resin 26 can be arranged without a gap along the outer circumference of the contact surface 23b of the lid member 23 without interruption, the lid member 23 can be fixed to the base portion 21. It can be done reliably and firmly.
  • the upper surface 21a1 of the recess 21c1d and the outer surface 30A1b of the first protruding portion 30A1 are in contact with each other and are engaged with each other, so that the lid member 23 does not fall off from the base portion 21. Therefore, the workability of pouring the fixing resin 26 is good.
  • a chamfered portion 23e having the corner cut out is formed at a part of the corner where the contact surface 23b and the side surface 23d of the lid member 23 intersect. ing. Further, a notch 21e is formed in the wall surface portion 21c facing the side surface 23d in which the chamfered portion 23e is formed. A tool can be inserted into the gap between the chamfered portion 23e and the opening forming surface 21b, for example, when the lid member 23 is removed from the base portion 21 during maintenance of the endoscope 100.
  • the movable member 51 is supported by the base portion 21 so as to be movable with respect to the base portion 21 in the first recess 21a.
  • the base portion 21 is formed with a bearing 28 that penetrates from the bottom surface of the first recess 21a to the riser accommodating space 20d.
  • the bearing 28 rotatably supports the shaft portion 51a fixed to the movable member 51.
  • the movable member 51 includes a lever 51b extending from the shaft portion 51a in a direction orthogonal to the shaft portion 51a in the first recess 21a. Therefore, the lever 51b swings around the rotation shaft of the shaft portion 51a in the first recess 21a.
  • the rotation axis of the movable member 51 is substantially parallel to the X axis. Therefore, the lever 51b moves in the first recess 21a (accommodation space 22) in a direction substantially along the longitudinal axis 2a.
  • the tip of the riser operating wire 18 is connected to the lever 51b at a position separated from the shaft portion 51a by a predetermined distance.
  • the raising base operation wire 18 is inserted into a through hole 21d penetrating the base portion 21 and the base portion 20a from the side surface of the first recess 21a toward the base end direction B.
  • a guide pipe 29 for guiding the riser operating wire 18 is inserted in the through hole 21d.
  • the guide pipe 29 is a rigid tubular member.
  • the riser operating wire 18 is inserted into the guide pipe 29.
  • the riser operating wire 18 moves forward and backward in the direction along the longitudinal axis 2a in response to the swing of the riser operation lever 14. Therefore, the lever 51b swings around the rotation axis in response to the swing of the riser operating lever 14.
  • the shaft portion 51a extends into the riser accommodating space 20d, and the riser 50 is fixed to the portion extending into the riser accommodating space 20d of the shaft portion 51a. Therefore, as shown in FIG. 8, the raising table 50 swings around the rotation axis of the shaft portion 51a together with the movable member 51. That is, the riser 50 swings around the rotation axis in response to the swing of the riser operating lever 14.
  • the raising table 50 is a tongue-shaped member extending in one direction from the shaft portion 51a.
  • a treatment tool channel tube 17 is opened on the base end direction B side of the riser stand 50 in the riser stand accommodation space 20d. As the raising table 50 swings, the angle of the treatment tool protruding from the treatment tool channel tube 17 changes.
  • a part of the lever 51b of the movable member 51 protrudes from the opening forming surface 21b from the opening of the first recess 21a. That is, a part of the movable member 51 projects into the second recess 23a formed in the lid member 23.
  • the movable member 51 that moves in the accommodation space 22 is arranged so as to move substantially parallel to the mating surface of the base portion 21 and the lid member 23, and a part of the movable member 51 is arranged.
  • the first recess 21a projects beyond the opening forming surface 21b (contact surface 23b), which is the mating surface of the base portion 21 and the lid member 23, into the second recess 23a. Therefore, when viewed from a direction parallel to the mating surface of the base portion 21 and the lid member 23 (for example, when viewed from the line-of-sight direction of FIG. 6), the movable member 51 is the mating surface of the base portion 21 and the lid member 23. It overlaps with.
  • At least one of both ends of the moving range of the movable member 51 in the accommodating space 22 is determined by the position where the movable member 51 abuts on the regulating portion 22a which is a part of the side wall of the accommodating space 22.
  • the end of the moving range of the movable member 51 on the tip direction A side is a position where the movable member 51 abuts on the regulating portion 22a provided on a part of the side wall of the first recess 21a.
  • Is. 6 and 10 show a state in which the movable member 51 is located at the end of the moving range on the tip direction A side and is in contact with the regulating portion 22a.
  • the movable member 51 when viewed from a direction parallel to the mating surface of the base portion 21 and the lid member 23, the movable member 51 is in a state of overlapping the mating surface of the base portion 21 and the lid member 23, and the accommodation space 22 Move inside. Therefore, the restricting portion 22a provided on the side wall of the first recess 21a abuts on the movable member 51 moving toward the tip direction A in the accommodation space 22 before the side wall of the second recess 23a. , It protrudes from the side wall of the second recess 23a toward the base end direction B side.
  • the opening width of the second recess 23a in the longitudinal axis 2a direction is wider than the opening width of the first recess 21a, and the side wall of the second recess 23a is the longitudinal axis from the movable member 51 in a state of being in contact with the regulating portion 22a. It is separated in the 2a direction.
  • the bearing 28 that supports the movable member 51 and the regulating portion 22a that defines the moving range of the movable member 51 are provided on the base portion 21 that is the same member, so that the accuracy of the moving range of the movable member 51 is accurate. Can be improved.
  • the regulating portion 22a may be provided on the lid member 23 (side wall of the second recess 23a).
  • the end of the movable member 51 on the base end direction B side is a position where the riser 50 fixed to the movable member 51 comes into contact with the stopper 20k protruding into the riser accommodation space 20d.
  • the stopper 20k is shown in FIGS. 5 and 8.
  • FIG. 8 shows a state in which the riser 50 is in contact with the stopper 20k.
  • the endoscope 100 of the present embodiment has a storage space 22 for accommodating the movable member 51 in the insertion portion 2 inserted into the subject.
  • the accommodation space 22 is formed by a first recess 21a formed in the base portion 21 provided in the insertion portion 2 and a second recess 23a formed in the lid member 23 adhesively fixed to the base portion 21. It is configured.
  • the lid member 23 is provided with a protrusion 30A and another protrusion 30B that protrude from the side surface 23d and are thinner than the wall thickness of the side surface 23d.
  • a part of the protrusion 30A enters the recess 21c1d of the wall surface portion 21c provided on the base portion 21, and the tip surface 30A1a of the second protrusion 30A2 abuts on the tip side wall surface 21ca in the direction of the longitudinal axis 2a.
  • a groove-shaped gap 27 having a predetermined width for pouring the fixing resin 26 into the side surface portion 23d and the wall surface portion 21c is formed.
  • the front end surface 30A2a of the second protrusion 30A2 is not in contact with the tip side wall surface 21ca, and the tip surface 30A1a of the first protrusion 30A1 is brought into contact with the bottom surface 21a2 of the recess 21c1d.
  • the lid member 23 may be positioned with respect to the base portion 21 in the direction.
  • the groove-shaped gap 27 is continuous along the side surface 23d without interruption. It is extended. Therefore, in the present embodiment, the fixing resin 26 before curing can be spread over the entire side surface 23d which is the outer circumference of the lid member 23.
  • the operator inserts a part of the protrusion 30A into the recess 21c1d of the tip side wall surface 21ca, and then inserts another protrusion 30B along the base end side wall surface 21cc.
  • the lid member 23 is inserted into the first recess 21a while being brought into contact with the lid member 23. After that, by curing the fixing resin 26 that has been poured into the gap 27, the lid member 23 can be firmly fixed while accurately positioning the lid member 23 with respect to the base portion 21.
  • the tip member 20 and the lid member 23 are made of a metal such as stainless steel, but the tip portion 20 and the lid member 23 may be made of a hard resin such as plastic.
  • the tip portion 20 and the lid member 23 may be bonded with the fixing resin 26 in the same manner as in the above-described embodiment, and instead of using the fixing resin, between the tip portion 20 and the lid member 23,
  • the groove-shaped gap 27 may be welded by using an ultrasonic welding technique or the like.
  • the endoscope 100 of the present embodiment it is possible to provide an endoscope having improved workability when fixing the lid member to the hard member arranged at the tip of the insertion portion. it can.
  • the lid member 23 is provided with the protrusion 30A, and the concave portion 21c1d is formed on the wall surface portion 21c of the first concave portion 21a of the tip member 20, but the lid member 23 is provided with the concave portion on the wall surface portion 21c.
  • a protrusion may be provided.
  • FIG. 16 is a cross-sectional view of the tip portion according to the present modification 1.
  • the tip side wall surface 21ca of the tip member 20 is provided with a protrusion 30C corresponding to the protrusion 30A in the above-described embodiment.
  • the protrusion 30C has the same shape as the protrusion 30A described above. That is, the protrusion 30C has a first protrusion 30C1 and a second protrusion 30C2 having a smaller protrusion amount than the first protrusion 30C1.
  • the first protruding portion 30C1 and the second protruding portion 30C2 have the same shape as the first protruding portion 30A1 and the second protruding portion 30A2 described above, respectively.
  • a first recess 23g is formed on the side surface 23d of the lid member 23.
  • the first recess 23g has the same shape as the recess 21a described above, and the protrusion 30C fits into the first recess 23g.
  • the protrusion 30C projects toward the side surface 23d of the lid member 23.
  • the inner side surface (the surface formed on the side opposite to the outside of the tip member 20) 30C1a of the first protrusion 30C1 is formed on the lower surface (the side opposite to the outside of the tip member 20) of the first recess 23g.
  • the tip surface 30C1b of the first protrusion 30C1 and the bottom surface 23gb of the first recess 23g are not in contact, and the outer surface 30C1c of the first protrusion 30C1 and the upper surface of the first recess 23g are in contact. No 23 gc is in contact.
  • the inner side surface 30C1a of the first protrusion 30C1 abuts on the lower surface 23ga of the first recess 23g, so that the lid member 23 is positioned in the direction of the outer surface 23f. Therefore, the tip surface 30C2a of the second protruding portion 30C2 comes into contact with the tip side wall surface 21ca, so that the lid member 23 is positioned in the longitudinal axis 2a direction.
  • the present modification 1 also produces the same effect as that of the above-described embodiment.
  • Modification 2 In the above-described embodiment, the lid member 23 has another protrusion 30B, and the other protrusion 30B is in contact with the base end side wall surface 21cc. However, the wall surface portion 21c is provided with a slope forming portion, and the lid member 23 is provided. It does not have to have a protrusion.
  • FIG. 17 is a cross-sectional view showing a contact state between the base end side wall surface 21 kb of the tip member 20 and the lid member 23 according to the present modification 2.
  • a slope forming portion 21ccbx is formed on the opening edge portion of the base end side wall surface 21cc of the tip member 20.
  • the slope forming portion 21cbx is formed of an inclined surface of the opening forming surface 21b that is inclined toward the base end side along the insertion axis.
  • the lower end edge 23i of the lid member 23 moves while abutting along the inclined surface 21cbx1 of the slope forming portion 21cbx, and the lid member 23 moves along the inclined surface 21cbx1. It is fitted inside the recess 21a.
  • the second modification also produces the same effect as that of the above-described embodiment.
  • the protrusion 30A is provided so as to be separated from the contact surface 23b and the outer surface 23f of the lid member 23 in the thickness direction, but may not be separated from the contact surface 23b.
  • FIG. 18 is a cross-sectional view showing a state in which a part of the protrusion 30D according to the third modification, which corresponds to the protrusion 30A in the above-described embodiment, is inserted into the recess 21c1d.
  • the protrusion 30D of the lid member 23 has a first protrusion 30D1 and a second protrusion 30D2.
  • the first protruding portion 30D1 and the second protruding portion 30D2 have the same shapes as the first protruding portion 30A1 and the second protruding portion 30A2 described above, respectively, but the lower surface (opening forming surface) of the first protruding portion 30D1.
  • a cut surface 30D1a is formed on the surface on the 21b side).
  • a recess 21c2d is formed on the tip side wall surface 21ca of the tip member 20.
  • the recess 21c2d is formed on the tip side wall surface 21ca so that the lower surface 21c2d1 of the recess 21c2d is flush with the opening forming surface 21b.
  • the recess 21c2d has the same shape as the recess 21c1d described above.
  • the positioning of the lid member 23 in the direction of the longitudinal axis 2a is performed by the tip surface 30D1b of the first protruding portion 30D1 coming into contact with the bottom surface 21c2d2 of the recess 21c2d.
  • FIG. 19 is a cross-sectional view showing a case where the tip surface 30D2a of the second protrusion 30D2 abuts on the tip side wall surface 21ca. In the case of FIG.
  • the cut surface is not formed on the lower surface of the first protrusion 30D1, but as in FIG. 18, the first A cut surface may be provided on the lower surface of the protruding portion 30D1.
  • the present modification 3 also produces the same effect as that of the above-described embodiment.
  • the protrusion 30C has two protrusions, a first protrusion 30C1 and a second protrusion 30C2, but the protrusion 30C does not have to have the two protrusions.
  • FIG. 20 is a cross-sectional view showing a state in which the protrusion 30E according to the present modification 4, which corresponds to the protrusion 30A in the above-described embodiment, has entered the recess 23g. As shown in FIG. 20, the protrusion 30E does not have two protrusions. Further, a cut surface 23d3 is formed below the side surface 23d of the lid member 23.
  • the tip surface 30Ea of the protrusion 30E comes into contact with the bottom surface 23d1 of the first recess 23g, so that the lid member 23 in the longitudinal axis 2a direction Positioning can be performed.
  • the tip side wall surface 21ca comes into contact with the lower portion of the side surface 23d of the lid member 23, so that the lid in the longitudinal axis 2a direction is formed.
  • the member 23 may be positioned.
  • the lid member 23 is provided with a cut surface 23d3 in FIG. 20, the lid member 23 does not have to have such a cut surface.
  • FIG. 21 is a cross-sectional view showing a state in which the protrusion 30E has entered the recess 23g1 when the lid member 23 does not have a cut surface, which is related to the present modification 4. As shown in FIG. 21, since the opening of the recess 23g1 provided in the lid member 23 is wide, the protrusion 30E can be easily inserted into the recess 23g1.
  • the present modification 4 also produces the same effect as that of the above-described embodiment.
  • the present invention is not limited to the above-described embodiment, and various modifications, modifications, and the like can be made without changing the gist of the present invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)

Abstract

This endoscope 100 is provided with: a leading-end member 20 which is disposed at the leading end of an insertion part 2 of the endoscope 100; a lid member 23 which covers a portion of the leading-end member 20; a first wall surface 21c which is provided to the leading-end member 20 and which has a flat plane that lies along a direction intersecting the longitudinal axis 2a of the insertion part 2; a second wall surface 23d which is provided to the lid member 23 and faces the first wall surface 21c when the lid member 23 covers a portion of the leading-end member 20; a protrusion 30A which is provided to one of the first wall surface 21c and the second wall surface 23d so as to protrude toward the other; and a recess 21c1d which is provided to the other of the first wall surface 21c and the second wall surface 23d and in which the protrusion 30A is to be fitted.

Description

内視鏡Endoscope
　本発明は、被検体内に挿入される挿入部を備える内視鏡に関する。 The present invention relates to an endoscope including an insertion portion to be inserted into a subject.
　内視鏡には、当該挿入部に可動部材を備える型式のものがある。例えば日本国特開２００７－１３６０４４号公報には、挿入部に可動部材である起立レバーおよび起立台を備える内視鏡が開示されている。 Some endoscopes have a movable member at the insertion part. For example, Japanese Patent Application Laid-Open No. 2007-136044 discloses an endoscope having a standing lever and a standing stand, which are movable members, at an insertion portion.
　日本国特開２００７－１３６０４４号公報に開示の内視鏡では、起立レバーは、挿入部の先端部本体に形成された凹形状の空間であるレバー収容部内に配置されている。そして、日本国特開２００７－１３６０４４号公報に開示の内視鏡では、レバー収容部は、薄板状のカバーによって塞がれている。 In the endoscope disclosed in Japanese Patent Application Laid-Open No. 2007-136044, the standing lever is arranged in the lever accommodating portion which is a concave space formed in the main body of the tip portion of the insertion portion. Then, in the endoscope disclosed in Japanese Patent Application Laid-Open No. 2007-136044, the lever accommodating portion is closed by a thin plate-shaped cover.
　内視鏡は、繰り返し利用されるものであることから、物理的な衝撃に対する耐性の向上が求められる。例えば、日本国特開２００７－１３６０４４号公報に開示されているような、レバー収容部を塞ぐカバーを有する内視鏡であれば、カバーを固定する強度を向上させることが求められる。 Since endoscopes are used repeatedly, it is required to improve their resistance to physical impact. For example, in the case of an endoscope having a cover that closes the lever accommodating portion as disclosed in Japanese Patent Application Laid-Open No. 2007-136044, it is required to improve the strength of fixing the cover.
　そこで、国際公開ＷＯ２０１９／１５０６３３号公報に開示のように、組み立て時において、蓋部材の突起を基台部のレバー収容部の壁面部に当接させながら、蓋部材と壁面部の隙間に流し込んだ固定用樹脂を硬化させることによって、基台部に対して蓋部材を精度よく位置決めしながら、蓋部材を基台部に強固に固定する技術が提案されている。 Therefore, as disclosed in International Publication WO2019 / 150633, at the time of assembly, the protrusion of the lid member was poured into the gap between the lid member and the wall surface portion while being brought into contact with the wall surface portion of the lever accommodating portion of the base portion. A technique has been proposed in which the lid member is firmly fixed to the base portion while the lid member is accurately positioned with respect to the base portion by curing the fixing resin.
　しかし、固定用樹脂を蓋部材と壁面部の隙間に流し込むときに、蓋部材が基台部から脱落する場合があり、蓋部材を基台部に固定する作業がし難い。 However, when the fixing resin is poured into the gap between the lid member and the wall surface portion, the lid member may fall off from the base portion, and it is difficult to fix the lid member to the base portion.
　本発明は、このような問題を解決するものであり、挿入部先端に配置された硬質部材に蓋部材を固定する際の作業性を向上させた内視鏡を提供することを目的とする。 The present invention solves such a problem, and an object of the present invention is to provide an endoscope having improved workability when fixing a lid member to a hard member arranged at the tip of an insertion portion.
　本発明の一態様の内視鏡は、内視鏡の挿入部先端に配置された硬質部材と、前記硬質部材の一部を覆う蓋部材と、前記硬質部材に設けられ、前記挿入部の長手軸に対し交差する方向に沿った平面を有する第１壁面と、前記蓋部材に設けられ、前記蓋部材が前記硬質部材の一部を覆う際に前記第１壁面に対向する第２壁面と、前記第１壁面と前記第２壁面の一方に設けられ、他方に向かって突出する突起と、前記第１壁面と前記第２壁面の他方に設けられ、前記突起が嵌入する凹部と、を備える。 The endoscope according to one aspect of the present invention includes a hard member arranged at the tip of an insertion portion of the endoscope, a lid member covering a part of the hard member, and a length of the insertion portion provided on the hard member. A first wall surface having a plane along a direction intersecting the axis, and a second wall surface provided on the lid member and facing the first wall surface when the lid member covers a part of the hard member. It includes a protrusion provided on one of the first wall surface and the second wall surface and projecting toward the other, and a recess provided on the other side of the first wall surface and the second wall surface into which the protrusion fits.
本発明の実施形態に関わる側視型の内視鏡の概略的な構成を示す図である。It is a figure which shows the schematic structure of the side-view type endoscope which concerns on embodiment of this invention. 本発明の実施形態に関わる挿入部の先端部の斜視図である。It is a perspective view of the tip part of the insertion part which concerns on embodiment of this invention. 本発明の実施形態に関わる、先端カバーと先端部材とを分離した状態で示す斜視図である。It is a perspective view which shows the tip cover and the tip member separated state which concerns on embodiment of this invention. 本発明の実施形態に関わる、先端カバーが装着されていない状態の先端部の左側面を示す図である。It is a figure which shows the left side surface of the tip part in the state which the tip cover is not attached which concerns on embodiment of this invention. 図４のＶ－Ｖ断面図である。FIG. 5 is a sectional view taken along line VV of FIG. 図４のＶＩ－ＶＩ断面図である。FIG. 4 is a sectional view taken along line VI-VI of FIG. 本発明の実施形態に関わる先端部材の分解斜視図である。It is an exploded perspective view of the tip member which concerns on embodiment of this invention. 図５のＶＩＩＩ－ＶＩＩＩ断面図である。FIG. 5 is a sectional view taken along line VIII-VIII of FIG. 本発明の実施形態に関わる先端部材の右側面を示す図である。It is a figure which shows the right side surface of the tip member which concerns on embodiment of this invention. 本発明の実施形態に関わる、蓋部材を取り外した状態の先端部材の右側面を示す図である。It is a figure which shows the right side surface of the tip member with the lid member removed, which concerns on embodiment of this invention. 図４のＸＩ－ＸＩ断面図である。FIG. 4 is a cross-sectional view taken along the line XI-XI of FIG. 本発明の実施形態に関わる、長手軸に沿った蓋部材と第２腕部の断面図である。It is sectional drawing of the lid member and the 2nd arm part along the longitudinal axis which concerns on embodiment of this invention. 本発明の実施形態に関わる、蓋部材の当接面の反対側の外表面側から見た斜視図である。It is a perspective view seen from the outer surface side on the opposite side of the contact surface of a lid member which concerns on embodiment of this invention. 本発明の実施形態に関わる、蓋部材の当接面側から見た斜視図である。It is a perspective view seen from the contact surface side of the lid member which concerns on embodiment of this invention. 本発明の実施形態に関わる、蓋部材の突起の一部が凹部に入り込んだ状態を示す断面図である。It is sectional drawing which shows the state which a part of the protrusion of the lid member has entered into the recess, which concerns on embodiment of this invention. 本発明の実施形態の変形例１に関わる先端部の断面図である。It is sectional drawing of the tip part which concerns on the modification 1 of the Embodiment of this invention. 本発明の実施形態の変形例２に関わる、先端部材の基端側壁面と、蓋部材の当接状態を示した断面図である。It is sectional drawing which showed the contact state of the base end side wall surface of the tip member, and the lid member which concerns on the modification 2 of the Embodiment of this invention. 本発明の実施形態の変形例３に関わる蓋部材の突起の一部が凹部に差し込まれた状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which a part of the protrusion of the lid member according to the third modification of the embodiment of the present invention is inserted into the recess. 本発明の実施形態の変形例３に関わる、第２突出部の先端面が先端側壁面に当接する場合を示す断面図である。It is sectional drawing which shows the case where the tip surface of the 2nd protrusion comes into contact with the tip side wall surface which concerns on the modification 3 of the Embodiment of this invention. 本発明の実施形態の変形例４に関わる突起が凹部に入り込んだ状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which a protrusion according to a modification 4 of the embodiment of the present invention has entered a recess. 本発明の実施形態の変形例４に関わる、蓋部材がカット面を有さない場合の突起が凹部に入り込んだ状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which a protrusion has entered a recess when the lid member does not have a cut surface, according to a modification 4 of the embodiment of the present invention.
　以下に、本発明の好ましい形態について図面を参照して説明する。なお、以下の説明に用いる各図においては、各構成要素を図面上で認識可能な程度の大きさとするため、構成要素毎に縮尺を異ならせてあるものであり、本発明は、これらの図に記載された構成要素の数量、構成要素の形状、構成要素の大きさの比率、および各構成要素の相対的な位置関係のみに限定されるものではない。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each of the drawings used in the following description, the scale is different for each component in order to make each component recognizable in the drawings. It is not limited only to the number of components, the shape of the components, the size ratio of the components, and the relative positional relationship of each component described in.
　はじめに、内視鏡の全体構成について説明する。図１は、内視鏡１００の概略的な構成を示す図である。本実施形態の内視鏡１００は、内視鏡本体１および先端カバー６０を備える。本実施形態では一例として、内視鏡１００は、被検体である人体内に挿入される挿入部２を有する内視鏡であり、より具体的には側視型の十二指腸用内視鏡である。
　内視鏡本体１は、被検体内に挿入される挿入部２と、挿入部２の基端側に設けられた操作部３と、操作部３から延出するユニバーサルコード４と、を備えて構成されている。 First, the overall configuration of the endoscope will be described. FIG. 1 is a diagram showing a schematic configuration of the endoscope 100. The endoscope 100 of the present embodiment includes an endoscope main body 1 and a tip cover 60. In the present embodiment, as an example, the endoscope 100 is an endoscope having an insertion portion 2 to be inserted into the human body as a subject, and more specifically, a side-view type duodenal endoscope. ..
The endoscope main body 1 includes an insertion portion 2 to be inserted into the subject, an operation portion 3 provided on the base end side of the insertion portion 2, and a universal cord 4 extending from the operation portion 3. It is configured.
　操作部３には、湾曲操作装置１１と、送気送水釦１２と、吸引釦１３と、起上台操作レバー１４と、操作スイッチ１５と、が設けられている。操作スイッチ１５は、挿入部２に設けられた撮像装置４２（図１には図示せず）を操作するための電子スイッチである。 The operation unit 3 is provided with a bending operation device 11, an air supply / water supply button 12, a suction button 13, a riser operation lever 14, and an operation switch 15. The operation switch 15 is an electronic switch for operating the image pickup device 42 (not shown in FIG. 1) provided in the insertion unit 2.
　操作部３には、図示しない処置具を体内に導入するための処置具挿入口１６が設けられている。処置具挿入口１６にはチャンネルチューブ１７の基端側が接続されている。チャンネルチューブ１７の先端側は、挿入部２の先端部５において開口している。 The operation unit 3 is provided with a treatment tool insertion port 16 for introducing a treatment tool (not shown) into the body. The base end side of the channel tube 17 is connected to the treatment tool insertion port 16. The tip end side of the channel tube 17 is open at the tip end portion 5 of the insertion portion 2.
　挿入部２は、先端に配設される先端部５、先端部５の基端側に配設される湾曲自在な湾曲部６、および湾曲部６の基端側と操作部３とを接続する可撓性を有する可撓管部７が連設されて構成されている。先端部５には、先端カバー６０が装着される。先端部５および先端カバー６０の構成の詳細は後述する。 The insertion portion 2 connects the tip portion 5 disposed at the tip, the bendable curved portion 6 disposed on the proximal end side of the distal end portion 5, and the proximal end side of the curved portion 6 and the operating portion 3. Flexible tube portions 7 are connected and configured. A tip cover 60 is attached to the tip portion 5. Details of the configuration of the tip portion 5 and the tip cover 60 will be described later.
　湾曲部６は、操作部３に設けられた湾曲操作装置１１の上下湾曲ノブ１１ａの回動に応じて上方向又は下方向に湾曲し、左右湾曲ノブ１１ｂの回動に応じて左方向又は右方向に湾曲する。 The curved portion 6 is curved upward or downward according to the rotation of the vertical curved knob 11a of the curved operating device 11 provided in the operation unit 3, and is curved leftward or right according to the rotation of the left-right curved knob 11b. Curve in the direction.
　挿入部２内には、起上台操作ワイヤ１８（図１には不図示）が挿通されている。起上台操作ワイヤ１８は、起上台操作レバー１４の揺動に応じて、長手方向に進退移動する。すなわち、起上台操作レバー１４は、挿入部２内に挿通された起上台操作ワイヤ１８を押し引きする装置を、使用者が操作するための操作部材である。起上台操作ワイヤ１８の先端は、先端部５に設けられた後述する可動部材５１（図１には不図示）に接続されている。 A riser operating wire 18 (not shown in FIG. 1) is inserted into the insertion portion 2. The riser operating wire 18 moves forward and backward in the longitudinal direction in response to the swing of the riser operation lever 14. That is, the raising table operating lever 14 is an operating member for the user to operate the device for pushing and pulling the raising table operating wire 18 inserted into the insertion portion 2. The tip of the riser operating wire 18 is connected to a movable member 51 (not shown in FIG. 1), which will be described later, provided at the tip portion 5.
　図２は、先端部５の斜視図である。図２に示すように、先端部５には、先端カバー６０が装着される。先端カバー６０は、先端部５の所定の外表面を覆う鞘状の部材であり、先端部５に着脱可能である。図３は、先端カバー６０と先端部５とを分離した状態で示す斜視図である。 FIG. 2 is a perspective view of the tip portion 5. As shown in FIG. 2, a tip cover 60 is attached to the tip portion 5. The tip cover 60 is a sheath-shaped member that covers a predetermined outer surface of the tip portion 5, and is removable from the tip portion 5. FIG. 3 is a perspective view showing the tip cover 60 and the tip 5 in a separated state.
　先端カバー６０は、本実施形態では一例として、ポリエチレンまたはポリプロピレン等の樹脂のうち、ゴム等に比べて弾性が低く、塑性変形や破断しやすい樹脂によって形成される。本実施形態の先端カバー６０は、先端部５に装着された後に当該先端部５から取り外される際に不可逆な変形や破断が生じるようになっており、再使用できないようになっている。図３においては、先端部５に一度も装着されたことのない状態（未使用状態）の先端カバー６０を示している。 As an example in this embodiment, the tip cover 60 is formed of a resin such as polyethylene or polypropylene, which has lower elasticity than rubber or the like and is easily plastically deformed or broken. The tip cover 60 of the present embodiment is irreversibly deformed or broken when it is removed from the tip portion 5 after being attached to the tip portion 5, and cannot be reused. FIG. 3 shows a tip cover 60 in a state (unused state) that has never been attached to the tip portion 5.
　先端部５の構成について説明する。なお、以下の説明において、細長な挿入部２の長手方向に沿う軸を長手軸２ａと称する。また、長手軸２ａに沿って挿入部２の先端側に向かう方向を先端方向Ａと称し、先端方向Ａの反対の方向を基端方向Ｂと称する。また、長手軸２ａに直交する平面上において互いに直交する二つの直線軸をＸ軸およびＹ軸と定義する。そして、Ｘ軸に沿って一方の側に向かう方向を右方向Ｒと称し、右方向Ｒの反対方向を左方向Ｌと称する。また、Ｙ軸に沿って一方の側に向かう方向を上方向Ｕと称し、上方向Ｕの反対方向を下方向Ｄと称する。Ｘ軸およびＹ軸は、湾曲部６の湾曲方向と略平行である。本実施形態では一例として、長手軸２ａに沿って基端側から先端側に向かって見た場合であって、Ｘ軸を水平とした場合において、右側が右方向Ｒであり上側が上方向Ｕであるとする。 The configuration of the tip portion 5 will be described. In the following description, the axis along the longitudinal direction of the elongated insertion portion 2 is referred to as a longitudinal axis 2a. Further, the direction toward the tip end side of the insertion portion 2 along the longitudinal axis 2a is referred to as the tip end direction A, and the direction opposite to the tip end direction A is referred to as the proximal end direction B. Further, two linear axes orthogonal to each other on a plane orthogonal to the longitudinal axis 2a are defined as an X axis and a Y axis. The direction toward one side along the X axis is referred to as the right direction R, and the direction opposite to the right direction R is referred to as the left direction L. Further, the direction toward one side along the Y axis is referred to as an upward direction U, and the direction opposite to the upward direction U is referred to as a downward direction D. The X-axis and the Y-axis are substantially parallel to the bending direction of the bending portion 6. In the present embodiment, as an example, when viewed from the proximal end side to the distal end side along the longitudinal axis 2a, when the X axis is horizontal, the right side is the right direction R and the upper side is the upward direction U. Suppose that
　図４は、先端カバー６０が装着されていない状態の先端部５の左側面を示す図である。また、図５は、図４のＶ－Ｖ断面図である。図６は、図４のＶＩ－ＶＩ断面図である。図７は、先端部材２０の分解斜視図である。 FIG. 4 is a view showing the left side surface of the tip portion 5 in a state where the tip cover 60 is not attached. Further, FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is an exploded perspective view of the tip member 20.
　図３に示すように、先端部５は、先端部材２０と、電気絶縁性を有する樹脂またはセラミック製の絶縁部２０ｊと、を備える。先端部材２０は、ステンレスなどの金属製の硬質部材であり、内視鏡本体１の挿入部２先端に配置された硬質部材である。先端部材２０は、湾曲部６の先端に固定される基部２０ａと、基部２０ａから先端方向Ａに向かって突出する一対の腕部である第１腕部２０ｂおよび第２腕部２０ｃと、第１腕部２０ｂおよび第２腕部２０ｃの間に形成された空間である起上台収容空間２０ｄと、を有している。基部２０ａの外形は略柱状である。基部２０ａの外周は、環状の絶縁部２０ｊによって覆われている。 As shown in FIG. 3, the tip portion 5 includes a tip member 20 and an insulating portion 20j made of a resin or ceramic having electrical insulation. The tip member 20 is a hard member made of metal such as stainless steel, and is a hard member arranged at the tip of the insertion portion 2 of the endoscope main body 1. The tip member 20 includes a base portion 20a fixed to the tip end of the curved portion 6, a first arm portion 20b and a second arm portion 20c which are a pair of arm portions protruding from the base portion 20a toward the tip end direction A, and a first arm portion 20c. It has a riser accommodating space 20d, which is a space formed between the arm portion 20b and the second arm portion 20c. The outer shape of the base 20a is substantially columnar. The outer circumference of the base portion 20a is covered with an annular insulating portion 20j.
　第１腕部２０ｂおよび第２腕部２０ｃは、間に形成される空間である起上台収容空間２０ｄが、上方向Ｕ、下方向Ｄおよび先端方向Ａの三方に向かって開放されるように配置されている。すなわち、第１腕部２０ｂおよび第２腕部２０ｃは、起上台収容空間２０ｄを間に挟んでＸ軸に沿う方向に配列されている。本実施形態では一例として、第１腕部２０ｂが起上台収容空間２０ｄの左方向Ｌ側に配置されており、第２腕部２０ｃが起上台収容空間２０ｄの右方向Ｒ側に配置されている。 The first arm portion 20b and the second arm portion 20c are arranged so that the riser accommodating space 20d, which is a space formed between them, is opened toward three directions of the upward direction U, the downward direction D, and the tip direction A. Has been done. That is, the first arm portion 20b and the second arm portion 20c are arranged in the direction along the X axis with the riser accommodating space 20d in between. In the present embodiment, as an example, the first arm portion 20b is arranged on the left L side of the riser accommodating space 20d, and the second arm portion 20c is arranged on the right R side of the riser accommodating space 20d. ..
　第１腕部２０ｂの外周面のうちの上方向Ｕに面する上面には、照明レンズ４１、撮像装置４２および洗浄ノズル４３が配設されている。照明レンズ４１は撮像装置４２の被写体に向かって照明光を出射するためのものである。照明光は、挿入部２内に挿通された光ファイバケーブル４１ａを通って発光装置から照明レンズまで導かれる。発光装置は、内視鏡１００に配設されていてもよいし、内視鏡１００に接続される外部装置に配設されていてもよい。 An illumination lens 41, an image pickup device 42, and a cleaning nozzle 43 are arranged on the upper surface of the outer peripheral surface of the first arm portion 20b facing upward U. The illumination lens 41 is for emitting illumination light toward the subject of the image pickup apparatus 42. The illumination light is guided from the light emitting device to the illumination lens through the optical fiber cable 41a inserted into the insertion portion 2. The light emitting device may be arranged in the endoscope 100, or may be arranged in an external device connected to the endoscope 100.
　撮像装置４２の視野は、概ね上方向Ｕを中心としている。すなわち、撮像装置４２は、挿入部２の側方を視野に入れている。洗浄ノズル４３は、照明レンズ４１および撮像装置４２に向かって流体を噴出する部位である。 The field of view of the image pickup apparatus 42 is generally centered on the upward direction U. That is, the image pickup apparatus 42 has a side view of the insertion portion 2. The cleaning nozzle 43 is a portion that ejects a fluid toward the illumination lens 41 and the image pickup device 42.
　図５に示すように、第１腕部２０ｂの内部には、撮像装置収容空間２０ｅが形成されている。撮像装置収容空間２０ｅ内には、光ファイバケーブル４１ａの先端部および撮像装置４２が配設される。 As shown in FIG. 5, an image pickup device accommodation space 20e is formed inside the first arm portion 20b. The tip of the optical fiber cable 41a and the image pickup device 42 are arranged in the image pickup device accommodation space 20e.
　撮像装置収容空間２０ｅは、基部２０ａを貫通する貫通孔２０ｆを通って湾曲部６の内部空間に連通している。光ファイバケーブル４１ａの先端部および撮像装置４２は、貫通孔２０ｆを通って撮像装置収容空間２０ｅ内に挿入されている。 The image pickup device accommodation space 20e communicates with the internal space of the curved portion 6 through a through hole 20f penetrating the base portion 20a. The tip of the optical fiber cable 41a and the image pickup device 42 are inserted into the image pickup device accommodation space 20e through the through hole 20f.
　また、撮像装置収容空間２０ｅは、図７に示すように第１腕部２０ｂの下方向Ｄに面する下面において開口する開口部２０ｇを有している。当該開口部２０ｇは、開口部２０ｇ内に陥入する栓体２０ｈによって閉塞される。栓体２０ｈは、接着剤によって開口部２０ｇ内に固定される。また、図５に示すように、栓体２０ｈには、例えば内視鏡１００のメンテナンス時において当該栓体２０ｈを開口部２０ｇ内から抜き出す際に、工具を引っかけるための爪２０ｉが形成されている。 Further, as shown in FIG. 7, the image pickup apparatus accommodation space 20e has an opening 20g that opens on the lower surface facing the downward direction D of the first arm portion 20b. The opening 20g is closed by a plug body 20h that intrudes into the opening 20g. The plug body 20h is fixed in the opening 20g by an adhesive. Further, as shown in FIG. 5, the plug body 20h is formed with a claw 20i for hooking a tool when the plug body 20h is pulled out from the opening 20g at the time of maintenance of the endoscope 100, for example. ..
　詳しくは後述するが、第２腕部２０ｃ内には、可動部材５１が配設される収容空間２２が設けられている。可動部材５１は、起上台操作ワイヤ１８の動きを起上台５０に伝える部材である。 As will be described in detail later, a storage space 22 in which the movable member 51 is arranged is provided in the second arm portion 20c. The movable member 51 is a member that transmits the movement of the raising table operation wire 18 to the raising table 50.
　先端カバー６０は、先端方向Ａ側が閉じており基端方向Ｂ側が開口している鞘状の部材である。先端カバー６０の基端方向Ｂ側に設けられた開口を、挿入口６０ｄと称する。先端カバー６０を先端部５に装着する際には、挿入口６０ｄを経由して先端カバー６０内に先端部５が挿入される。 The tip cover 60 is a sheath-shaped member that is closed on the tip direction A side and open on the base end direction B side. The opening provided on the base end direction B side of the tip cover 60 is referred to as an insertion port 60d. When the tip cover 60 is attached to the tip 5, the tip 5 is inserted into the tip cover 60 via the insertion port 60d.
　先端カバー６０には、先端部５に装着された状態において、起上台収容空間２０ｄを上方向Ｕのみに向かって露呈させる開口部６０ａを有する。また、先端カバー６０が先端部材２０に装着されている状態において、照明レンズ４１、撮像装置４２および洗浄ノズル４３も、開口部６０ａを通して上方向Ｕに向かって露出する。 The tip cover 60 has an opening 60a that exposes the riser accommodating space 20d only in the upward direction U when attached to the tip 5. Further, in a state where the tip cover 60 is attached to the tip member 20, the illumination lens 41, the image pickup device 42, and the cleaning nozzle 43 are also exposed upward through the opening 60a.
　先端カバー６０の外表面において、開口部６０ａは、挿入口６０ｄと接続していない。よって、先端カバー６０の基端６０ｂには、長手軸２ａ周りに全周が環状に繋がった環状部６０ｅが形成されている。先端カバー６０が先端部材２０に装着されている状態では、環状部６０ｅが、絶縁部２０ｊの外周に嵌合する。 On the outer surface of the tip cover 60, the opening 60a is not connected to the insertion port 60d. Therefore, at the base end 60b of the tip cover 60, an annular portion 60e is formed in which the entire circumference is connected in an annular shape around the longitudinal axis 2a. When the tip cover 60 is attached to the tip member 20, the annular portion 60e fits on the outer circumference of the insulating portion 20j.
　次に、先端部材２０の第２腕部２０ｃに設けられた収容空間２２および当該収容空間２２内に配設された可動部材５１の構成について説明する。 Next, the configuration of the accommodation space 22 provided in the second arm portion 20c of the tip member 20 and the movable member 51 arranged in the accommodation space 22 will be described.
　図８は、図５のＶＩＩＩ－ＶＩＩＩ断面図である。図９は、先端部材２０の右側面を示す図である。図１０は、蓋部材２３を取り外した状態の先端部材２０の右側面を示す図である。図１１は、図４のＸＩ－ＸＩ断面図である。図１２は、長手軸２ａに沿った蓋部材２３と第２腕部２０ｃの断面図である。 FIG. 8 is a sectional view taken along line VIII-VIII of FIG. FIG. 9 is a view showing the right side surface of the tip member 20. FIG. 10 is a view showing the right side surface of the tip member 20 with the lid member 23 removed. FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. FIG. 12 is a cross-sectional view of the lid member 23 and the second arm portion 20c along the longitudinal axis 2a.
　図５、図６および図７に示すように、第２腕部２０ｃは、先端部材２０と一体である基台部２１と、基台部２１に固定用樹脂２６によって接着固定されている蓋部材２３と、によって構成されている。本実施形態では、蓋部材２３は、基台部２１の右側面に固定されている。蓋部材２３は、先端部材２０の一部を覆う。そして収容空間２２は、基台部２１および蓋部材２３の互いに対向する面にそれぞれ凹設された第１凹部２１ａおよび第２凹部２３ａによって構成されている。また蓋部材２３は、上述した先端部材２０と同様に、ステンレスなどの金属製の硬質部材である。 As shown in FIGS. 5, 6 and 7, the second arm portion 20c has a base portion 21 that is integrated with the tip member 20 and a lid member that is adhesively fixed to the base portion 21 by a fixing resin 26. 23 and. In the present embodiment, the lid member 23 is fixed to the right side surface of the base portion 21. The lid member 23 covers a part of the tip member 20. The accommodation space 22 is composed of a first recess 21a and a second recess 23a, which are recessed on the surfaces of the base portion 21 and the lid member 23 facing each other, respectively. Further, the lid member 23 is a hard member made of metal such as stainless steel, similarly to the tip member 20 described above.
　より詳細に、基台部２１は、第１凹部２１ａ、開口形成面２１ｂおよび壁面部２１ｃを備える。第１凹部２１ａは、基台部２１の表面のうちの、開口形成面２１ｂ内において開口している先端部材２０の窪みである。すなわち、開口形成面２１ｂは、第１凹部２１ａの開口の周囲を囲うように形成された面である。 More specifically, the base portion 21 includes a first recess 21a, an opening forming surface 21b, and a wall surface portion 21c. The first recess 21a is a recess of the tip member 20 that is open in the opening forming surface 21b on the surface of the base portion 21. That is, the opening forming surface 21b is a surface formed so as to surround the opening of the first recess 21a.
　開口形成面２１ｂの形状は特に限定されるものではなく、例えば単一の平面によって構成されていてもよいし、複数の平面によって構成されていてもよいし、曲面によって構成されていてもよい。 The shape of the opening forming surface 21b is not particularly limited, and may be composed of, for example, a single plane, a plurality of planes, or a curved surface.
　本実施形態では一例として、図５および図１１に示すように、開口形成面２１ｂは、長手軸２ａに略平行であって互いに交差する角度で配置された一対の平面２１ｂ１および２１ｂ２を含む。一対の平面２１ｂ１および２１ｂ２は、両者の交線が外側に向かって凸となる稜線となるように、柱状である基台部２１の表面において異なる方向に面している。 In this embodiment, as an example, as shown in FIGS. 5 and 11, the opening forming surface 21b includes a pair of planes 21b1 and 21b2 arranged at angles substantially parallel to the longitudinal axis 2a and intersecting each other. The pair of planes 21b1 and 21b2 face different directions on the surface of the columnar base portion 21 so that the line of intersection of the two planes becomes a ridge line that is convex outward.
　この一対の平面２１ｂ１および２１ｂ２を含む開口形成面２１ｂは、長手軸２ａに直交する断面において山状に屈曲した形状となる。 The opening forming surface 21b including the pair of planes 21b1 and 21b2 has a mountain-shaped bent shape in a cross section orthogonal to the longitudinal axis 2a.
　壁面部２１ｃは、開口形成面２１ｂから基台部２１の外側に向かって立設されている。壁面部２１ｃについては後述する。 The wall surface portion 21c is erected from the opening forming surface 21b toward the outside of the base portion 21. The wall surface portion 21c will be described later.
　蓋部材２３は、先端部材２０の一部を覆うためのほぼ平板状に形成された部材であり、第２凹部２３ａ、当接面２３ｂを備えている。さらに蓋部材２３は、先端方向Ａ側の端面に突起３０Ａを、基端方向Ｂ側の端面に他の突起３０Ｂを備えている。当接面２３ｂは、開口形成面２１ｂに当接する面である。また、当接面２３ｂは、第１凹部２１ａの開口よりも大きく、第１凹部２１ａの開口の周囲全体にわたって開口形成面２１ｂと当接する。したがって、当接面２３ｂが開口形成面２１ｂに当接した状態では、第１凹部２１ａの開口は、蓋部材２３によって閉塞される。 The lid member 23 is a member formed in a substantially flat plate shape for covering a part of the tip member 20, and includes a second recess 23a and a contact surface 23b. Further, the lid member 23 is provided with a protrusion 30A on the end face on the distal end direction A side and another protrusion 30B on the end face on the proximal end direction B side. The contact surface 23b is a surface that contacts the opening forming surface 21b. Further, the contact surface 23b is larger than the opening of the first recess 21a and comes into contact with the opening forming surface 21b over the entire circumference of the opening of the first recess 21a. Therefore, when the contact surface 23b is in contact with the opening forming surface 21b, the opening of the first recess 21a is closed by the lid member 23.
　蓋部材２３は、第２凹部２３ａの外周部、すなわち側面２３ｄの近傍の部分が、第２凹部２３ａが形成された中央部よりも肉厚であるため、中央部と同等の厚さの板に比してより高い強度を有する。なお第２凹部２３ａの外周部における厚みは、蓋部材２３の必要強度に十分な厚みに設計されていれば良い。 Since the outer peripheral portion of the second recess 23a, that is, the portion near the side surface 23d is thicker than the central portion where the second recess 23a is formed, the lid member 23 has a plate having the same thickness as the central portion. It has higher strength than that. The thickness of the outer peripheral portion of the second recess 23a may be designed to be sufficient for the required strength of the lid member 23.
　当接面２３ｂは、第１凹部２１ａを閉塞するため、開口形成面２１ｂに密着する形状である。具体的に本実施形態では、開口形成面２１ｂが長手軸２ａに平行な断面において山状に屈曲した形状であることから、当接面２３ｂは開口形成面２１ｂの屈曲に合わせて谷状に屈曲した形状を有している。すなわち、当接面２３ｂは、開口形成面２１ｂの一対の平面２１ｂ１および２１ｂ２に平行となる一対の平面２３ｂ１および２３ｂ２を含む。 The contact surface 23b has a shape that is in close contact with the opening forming surface 21b in order to close the first recess 21a. Specifically, in the present embodiment, since the opening forming surface 21b is bent in a mountain shape in a cross section parallel to the longitudinal axis 2a, the contact surface 23b is bent in a valley shape in accordance with the bending of the opening forming surface 21b. Has a shaped shape. That is, the contact surface 23b includes a pair of planes 23b1 and 23b2 parallel to the pair of planes 21b1 and 21b2 of the opening forming surface 21b.
　このように、基台部２１側の開口形成面２１ｂが山形状であり、蓋部材２３側の当接面２３ｂが谷形状であることから、開口形成面２１ｂに当接面２３ｂを当接させることによって、蓋部材２３の基台部２１に対する長手軸２ａ周りの周方向の位置決めがなされる。本実施形態では、蓋部材２３の基台部２１に対する長手軸２ａ周りの周方向の位置決めとは、概ねＹ軸に沿った上方向Ｕおよび下方向Ｄの位置決めとなる。 As described above, since the opening forming surface 21b on the base portion 21 side has a mountain shape and the contact surface 23b on the lid member 23 side has a valley shape, the contact surface 23b is brought into contact with the opening forming surface 21b. As a result, the lid member 23 is positioned in the circumferential direction around the longitudinal axis 2a with respect to the base portion 21. In the present embodiment, the circumferential positioning of the lid member 23 with respect to the base portion 21 around the longitudinal axis 2a is the positioning in the upward direction U and the downward direction D along the Y axis.
　第２凹部２３ａは、当接面２３ｂ内において開口している。すなわち、第２凹部２３ａの開口の周囲は、当接面２３ｂによって囲まれている。第２凹部２３ａは、蓋部材２３が第１凹部２１ａの開口を閉塞した状態において第１凹部２１ａと繋がる。 The second recess 23a is open in the contact surface 23b. That is, the circumference of the opening of the second recess 23a is surrounded by the contact surface 23b. The second recess 23a is connected to the first recess 21a in a state where the lid member 23 closes the opening of the first recess 21a.
　以上に説明したように、収容空間２２は、基台部２１に設けられた第１凹部２１ａおよび蓋部材２３に設けられた第２凹部２３ａが向かい合わせとなるように、基台部２１と蓋部材２３とが接着されることによって形成されている。したがって、収容空間２２の側壁面には、第１凹部２１ａおよび第２凹部２３ａのそれぞれの底面から離間した位置において、基台部２１と蓋部材２３との間の境界線が存在する。 As described above, the accommodating space 22 has a base portion 21 and a lid so that the first recess 21a provided in the base portion 21 and the second recess 23a provided in the lid member 23 face each other. It is formed by adhering to the member 23. Therefore, on the side wall surface of the accommodation space 22, a boundary line between the base portion 21 and the lid member 23 exists at a position separated from the bottom surfaces of the first recess 21a and the second recess 23a.
　ここで、収容空間２２の側壁面とは、収容空間２２の内面のうち、第１凹部２１ａおよび第２凹部２３ａの底面を除いた面である。すなわち収容空間２２の側壁面とは、第１凹部２１ａおよび第２凹部２３ａの側壁によって構成される。また、境界線とは、基台部２１と蓋部材２３の合わせ面、すなわち開口形成面２１ｂおよび当接面２３ｂが収容空間２２の側壁面に現れたものである。本実施形態では、基台部２１と蓋部材２３の合わせ面は、長手軸２ａに略平行である。 Here, the side wall surface of the accommodation space 22 is a surface of the inner surface of the accommodation space 22 excluding the bottom surfaces of the first recess 21a and the second recess 23a. That is, the side wall surface of the accommodation space 22 is composed of the side walls of the first recess 21a and the second recess 23a. Further, the boundary line means that the mating surface of the base portion 21 and the lid member 23, that is, the opening forming surface 21b and the contact surface 23b appear on the side wall surface of the accommodation space 22. In the present embodiment, the mating surface of the base portion 21 and the lid member 23 is substantially parallel to the longitudinal axis 2a.
　次に、基台部２１に設けられた壁面部２１ｃ、および蓋部材２３に設けられた突起３０Ａ、他の突起３０Ｂについて説明する。 Next, the wall surface portion 21c provided on the base portion 21, the protrusion 30A provided on the lid member 23, and the other protrusions 30B will be described.
　まず、壁面部２１ｃについて説明する。壁面部２１ｃは、開口形成面２１ｂから基台部２１の外側に向かって立設されており、当接面２３ｂが開口形成面２１ｂに当接した状態の蓋部材２３の側面２３ｄの少なくとも一部に対向する面を有する。すなわち、壁面部２１ｃは、先端部材２０に設けられた窪みである凹部２１ａを囲う周縁面の一部である。 First, the wall surface portion 21c will be described. The wall surface portion 21c is erected from the opening forming surface 21b toward the outside of the base portion 21, and at least a part of the side surface 23d of the lid member 23 in a state where the contact surface 23b is in contact with the opening forming surface 21b. Has a surface facing the lid. That is, the wall surface portion 21c is a part of the peripheral surface surrounding the recess 21a which is a recess provided in the tip member 20.
　本実施形態の壁面部２１ｃは、蓋部材２３の周囲を、側面２３ｄから所定の距離だけ離間して囲うように配設されている。本実施形態では、壁面部２１ｃは、基台部２１の表面に形成され、蓋部材２３が内側に嵌り込む形状の凹部の側壁面であり、開口形成面２１ｂは当該凹部の底面にあたる。 The wall surface portion 21c of the present embodiment is arranged so as to surround the lid member 23 at a predetermined distance from the side surface 23d. In the present embodiment, the wall surface portion 21c is a side wall surface of a recess formed on the surface of the base portion 21 and the lid member 23 is fitted inward, and the opening forming surface 21b corresponds to the bottom surface of the recess.
　さらに、図１２に示すように、壁面部２１ｃのうち、先端方向Ａ側に形成された壁面（以下、先端側壁面という）２１ｃａには、突起３０Ａが嵌入する凹部２１ｃ１ｄが形成されている。すなわち、壁面部２１ｃは、先端側壁面２１ｃａを有する。先端側壁面２１ｃａは、先端部材２０に設けられ、挿入部２の長手軸２ａに対し交差する方向に沿って形成されている。凹部２１ｃ１ｄが形成されている面は、第１凹部２１ａを囲う周縁部の一部である。第１凹部２１ａは、先端部材２０に設けられた窪みである。 Further, as shown in FIG. 12, of the wall surface portion 21c, the wall surface (hereinafter referred to as the tip side wall surface) 21ca formed on the tip direction A side is formed with a recess 21c1d into which the protrusion 30A is fitted. That is, the wall surface portion 21c has a tip side wall surface 21ca. The tip side wall surface 21ca is provided on the tip member 20 and is formed along a direction intersecting the longitudinal axis 2a of the insertion portion 2. The surface on which the recess 21c1d is formed is a part of the peripheral edge surrounding the first recess 21a. The first recess 21a is a recess provided in the tip member 20.
　次に、蓋部材２３について説明する。図１３は、蓋部材２３の当接面２３ｂの反対側の外表面２３ｆ側から見た斜視図である。図１４は、蓋部材２３の当接面２３ｂ側から見た斜視図である。図１５は、蓋部材２３の突起３０Ａの一部が凹部２１ｃ１ｄに入り込んだ状態を示す断面図である。 Next, the lid member 23 will be described. FIG. 13 is a perspective view seen from the outer surface 23f side on the opposite side of the contact surface 23b of the lid member 23. FIG. 14 is a perspective view of the lid member 23 as viewed from the contact surface 23b side. FIG. 15 is a cross-sectional view showing a state in which a part of the protrusion 30A of the lid member 23 has entered the recess 21c1d.
　本実施形態では一例として、蓋部材２３は概ね矩形状であり、図９に示すように、一部が切り取られたカット形状部２３ｘを有している。基台部２１の第１凹部２１ａは、その蓋部材２３のカット形状部２３ｘの形状に対応した形状を有している。よって、基台部２１においてそのカット形状部２３ｘに対応した形状部分が肉厚となるので、第２腕部２０ｃの剛性が高まる。 In the present embodiment, as an example, the lid member 23 has a substantially rectangular shape, and as shown in FIG. 9, has a cut shape portion 23x in which a part is cut off. The first recess 21a of the base portion 21 has a shape corresponding to the shape of the cut shape portion 23x of the lid member 23. Therefore, in the base portion 21, the shape portion corresponding to the cut shape portion 23x becomes thick, so that the rigidity of the second arm portion 20c is increased.
　蓋部材２３の側面２３ｄは、長手軸２ａに略平行な一対の面と、長手軸に略直交する一対の面と、を含む。側面２３ｄは、蓋部材２３の周縁面の一部である。側面２３ｄは、蓋部材２３が先端部材２０の一部を覆う際に壁面部２１ｃに対向する。 The side surface 23d of the lid member 23 includes a pair of surfaces substantially parallel to the longitudinal axis 2a and a pair of surfaces substantially orthogonal to the longitudinal axis. The side surface 23d is a part of the peripheral surface of the lid member 23. The side surface 23d faces the wall surface 21c when the lid member 23 covers a part of the tip member 20.
　具体的には、図１３及び図１４に示すように、蓋部材２３は、突起３０Ａと他の突起３０Ｂを有している。突起３０Ａ及び他の突起３０Ｂは、蓋部材２３が基台部２１に装着されたときに、蓋部材２３の側面２３ｄの一部から壁面部２１ｃに向かって突出している。特に、突起３０Ａは、蓋部材２３が基台部２１に装着されたときに、先端方向Ａの先端側壁面２１ｃａに向かって突出し、他の突起３０Ｂは、蓋部材２３が基台部２１に装着されたときに、基端方向Ｂに向かって突出する。すなわち、他の突起３０Ｂは、突起３０Ａが先端部材２０に設けられた場合、蓋部材２３において突起３０Ａが設けられた側面とは反対側の面に設けられている。 Specifically, as shown in FIGS. 13 and 14, the lid member 23 has a protrusion 30A and another protrusion 30B. When the lid member 23 is attached to the base portion 21, the protrusions 30A and the other protrusions 30B project from a part of the side surface 23d of the lid member 23 toward the wall surface portion 21c. In particular, the protrusion 30A projects toward the tip side wall surface 21ca in the tip direction A when the lid member 23 is mounted on the base portion 21, and the other protrusions 30B are mounted on the base portion 21 by the lid member 23. When it is done, it protrudes toward the base end direction B. That is, when the protrusion 30A is provided on the tip member 20, the other protrusion 30B is provided on the surface of the lid member 23 opposite to the side surface on which the protrusion 30A is provided.
　突起３０Ａは、壁面２１ｃ１に形成された凹部２１ｃ１ｄに差し込み可能なように形成されている。図１３に示すように、突起３０Ａは、蓋部材２３の側面から突出する第１突出部３０Ａ１と、第１突出部３０Ａ１よりも突出量が少ない第２突出部３０Ａ２を有する。第１突出部３０Ａ１の長手軸２ａに直交する側面２３ｄ方向に沿った長さＬ１は、第２突出部３０Ａ２の長手軸２ａに直交する側面２３ｄ方向に沿った長さＬ２よりも長い。 The protrusion 30A is formed so that it can be inserted into the recess 21c1d formed in the wall surface 21c1. As shown in FIG. 13, the protrusion 30A has a first protrusion 30A1 protruding from the side surface of the lid member 23, and a second protrusion 30A2 having a smaller protrusion amount than the first protrusion 30A1. The length L1 along the side surface 23d direction orthogonal to the longitudinal axis 2a of the first protrusion 30A1 is longer than the length L2 along the side surface 23d direction orthogonal to the longitudinal axis 2a of the second protrusion 30A2.
　図１５に示すように、第１突出部３０Ａ１は、その突出方向（先端方向Ａ）の先端面３０Ａ１ａと、外表面２３ｆ側の外側面３０Ａ１ｂと、外表面２３ｆとは反対側の内側面３０Ａ１ｃを有する。凹部２１ｃ１ｄは、先端部材２０の外側の上面２１ａ１と、先端方向Ａ側の底面２１ａ２と、先端部材２０の内側の下面２１ａ３とを有する。 As shown in FIG. 15, the first projecting portion 30A1 includes a tip surface 30A1a in the projecting direction (tip direction A), an outer surface 30A1b on the outer surface 23f side, and an inner surface 30A1c on the opposite side to the outer surface 23f. Have. The recess 21c1d has an outer upper surface 21a1 of the tip member 20, a bottom surface 21a2 on the tip direction A side, and an inner lower surface 21a3 of the tip member 20.
　図１３に示すように、第１突出部３０Ａ１の上述した長さＬ１が第２突出部３０Ａ２の上述した長さＬ２よりも長く、かつ側面２３ｄからの第１突出部３０Ａ１の突出量が側面２３ｄからの第２突出部３０Ａ２の突出量よりも大きい。 As shown in FIG. 13, the above-mentioned length L1 of the first protrusion 30A1 is longer than the above-mentioned length L2 of the second protrusion 30A2, and the amount of protrusion of the first protrusion 30A1 from the side surface 23d is the side surface 23d. It is larger than the amount of protrusion of the second protrusion 30A2 from.
　また、固定用樹脂２６は、蓋部材２３の当接面２３ｂの一部と先端部材２０の開口形成面２１ｂの一部の間にも入り込む。さらに、固定用樹脂２６は、凹部２１ｃ１ｄの底面２１ａ２と先端面３０Ａ１ａとの間、及び凹部２１ｃ１ｄの下面２１ａ３と内側面３０Ａ１ｃとの間にも入り込む。 Further, the fixing resin 26 also enters between a part of the contact surface 23b of the lid member 23 and a part of the opening forming surface 21b of the tip member 20. Further, the fixing resin 26 also enters between the bottom surface 21a2 of the recess 21c1d and the front end surface 30A1a, and between the lower surface 21a3 and the inner side surface 30A1c of the recess 21c1d.
　先端部５を組み立てる作業者は、突起３０Ａを凹部２１ｃ１ｄに差し込んだ後に、他の突起３０Ｂが基端方向Ｂ側の壁面部２１ｃに沿って当接させながら、蓋部材２３を第１凹部２１ａの内側に嵌め込む。このとき、図１５に示すように、第２突出部３０Ａ２の先端面３０Ａ２ａは、先端方向Ａ側の先端側壁面２１ｃａに当接するが、第１突出部３０Ａ１の先端面３０Ａ１ａは、第１凹部２１ａの底面２１ａ２に押し付けられていない。すなわち、第１凹部２１ａに対する蓋部材２３の先端方向Ａの位置決めは、蓋部材２３の側面２３ｄからの第２突出部３０Ａ２の突出量によって規定される。 After inserting the protrusion 30A into the recess 21c1d, the operator assembling the tip portion 5 attaches the lid member 23 to the first recess 21a while the other protrusion 30B is in contact with the wall surface portion 21c on the base end direction B side. Fit inside. At this time, as shown in FIG. 15, the tip surface 30A2a of the second protrusion 30A2 abuts on the tip side wall surface 21ca on the tip direction A side, but the tip surface 30A1a of the first protrusion 30A1 is the first recess 21a. It is not pressed against the bottom surface 21a2 of. That is, the positioning of the lid member 23 in the tip direction A with respect to the first recess 21a is defined by the amount of protrusion of the second protruding portion 30A2 from the side surface 23d of the lid member 23.
　また、蓋部材２３が第１凹部２１ａの内側に嵌め込まれたとき、第１突出部３０Ａ１の外側面３０Ａ１ｂが凹部２１ｃ１ｄの上面２１ａ１に当接するように、第１突出部３０Ａ１は形成されている。このとき、第１突出部３０Ａ１の内側面３０Ａ１ｃは、第１凹部２１ａの下面２１ａ３に接していない。すなわち、先端部材２０の外側方向における蓋部材２３の位置決め及び先端部材２０の外表面と蓋部材２３の外表面２３ｆとの面位置調整は、第１突出部３０Ａ１の外側面３０Ａ１ｂと、第１凹部２１ａの外側面である上面２１ａ１との当接によって規定される。 Further, when the lid member 23 is fitted inside the first recess 21a, the first protrusion 30A1 is formed so that the outer surface 30A1b of the first protrusion 30A1 comes into contact with the upper surface 21a1 of the recess 21c1d. At this time, the inner side surface 30A1c of the first protrusion 30A1 is not in contact with the lower surface 21a3 of the first recess 21a. That is, the positioning of the lid member 23 in the outer direction of the tip member 20 and the adjustment of the surface positions of the outer surface of the tip member 20 and the outer surface 23f of the lid member 23 are performed on the outer surface 30A1b of the first protrusion 30A1 and the first recess. It is defined by the contact with the upper surface 21a1 which is the outer surface of the 21a.
　突起３０Ａ、他の突起３０Ｂは、図６および図１２に示すように、蓋部材２３の側面２３ｄにおける肉厚よりも小さい肉厚を有している。よって、図１５に示すように、突起３０Ａは、蓋部材２３の当接面２３ｂおよび当接面２３ｂとは反対側の外表面２３ｆから厚さ方向に離間している。第２突出部３０Ａ２の先端面３０Ａ２ａが先端方向Ａ側の先端側壁面２１ｃａに当接することによって、突起３０Ａが設けられた部分における側面２３ｄが壁面部２１ｃに密着することが防止され、側面２３ｄと壁面部２１ｃとの間には所定の幅の隙間２７が生じる。すなわち、蓋部材２３に設けられた第２突出部３０Ａ２は、蓋部材２３の側面２３ｄと先端部材２０の壁面部２１ｃ間隔を維持する位置決め用の突出部である。 As shown in FIGS. 6 and 12, the protrusions 30A and the other protrusions 30B have a wall thickness smaller than the wall thickness on the side surface 23d of the lid member 23. Therefore, as shown in FIG. 15, the protrusion 30A is separated from the contact surface 23b of the lid member 23 and the outer surface 23f on the side opposite to the contact surface 23b in the thickness direction. When the tip surface 30A2a of the second protrusion 30A2 comes into contact with the tip side wall surface 21ca on the tip direction A side, the side surface 23d in the portion where the protrusion 30A is provided is prevented from coming into close contact with the wall surface 21c, and the side surface 23d A gap 27 having a predetermined width is formed between the wall surface portion 21c and the wall surface portion 21c. That is, the second protruding portion 30A2 provided on the lid member 23 is a positioning protruding portion that maintains the distance between the side surface 23d of the lid member 23 and the wall surface portion 21c of the tip member 20.
　また、他の突起３０Ｂは、図１２及び図１４に示すように、カット面３０Ｂａを有している。突起３０Ａが凹部２１ｃ１ｄに差し込まれた後に、他の突起３０Ｂを、壁面部２１ｃのうち基端方向Ｂ側に形成された壁面（以下、基端側壁面という）２１ｃｂに沿って当接させながら、第１凹部２１ａの内側に嵌め込みし易いように、カット面３０Ｂａは、外表面２３ｆの逆側の面から長手軸２ａに向かって、カット面３０Ｂａが先端方向Ａに近づくように傾斜している。 Further, the other protrusion 30B has a cut surface 30Ba as shown in FIGS. 12 and 14. After the protrusion 30A is inserted into the recess 21c1d, the other protrusion 30B is brought into contact with the wall surface (hereinafter referred to as the base side wall surface) 21cc formed on the base end direction B side of the wall surface portion 21c while being brought into contact with each other. The cut surface 30Ba is inclined so that the cut surface 30Ba approaches the tip direction A from the surface opposite to the outer surface 23f toward the longitudinal axis 2a so that the cut surface 30Ba can be easily fitted inside the first recess 21a.
　基台部２１に設けられた先端側壁面２１ｃａと基端側壁面２１ｃｂは、蓋部材２３を長手軸２ａに沿った両方向から挟むように配設されている。したがって、本実施形態では、第２突出部３０Ａ２の先端面３０Ａ２ａが先端側壁面２１ｃａに当接することによって、蓋部材２３の基台部２１に対する長手軸２ａ方向の位置決めがなされる。 The tip side wall surface 21ca and the base end side wall surface 21cc provided on the base portion 21 are arranged so as to sandwich the lid member 23 from both directions along the longitudinal axis 2a. Therefore, in the present embodiment, the tip surface 30A2a of the second protrusion 30A2 comes into contact with the tip side wall surface 21ca, so that the lid member 23 is positioned in the longitudinal axis 2a direction with respect to the base portion 21.
　なお、図１２に示すように、蓋部材２３が第１凹部２１ａの内側に嵌め込まれたときの長手軸２ａ方向におけるクリアランス量Ｌｂは、第１突出部３０Ａ１の突出量Ｌａに略等しいが、カット面３０Ｂａが設けられていることによって、蓋部材２３が第１凹部２１ａの内側に嵌め込み可能となっている。 As shown in FIG. 12, the clearance amount Lb in the longitudinal axis 2a direction when the lid member 23 is fitted inside the first recess 21a is substantially equal to the protrusion amount La of the first protrusion 30A1, but is cut. Since the surface 30Ba is provided, the lid member 23 can be fitted inside the first recess 21a.
　蓋部材２３の基台部２１に対する長手軸２ａに直交する周方向の位置決めは、前述のように、開口形成面２１ｂに当接面２３ｂを当接させることによってなされる。したがって本実施形態では、蓋部材２３を基台部２１に接着する際には、作業者は、開口形成面２１ｂに当接面２３ｂを当接させ、突起３０Ａを凹部２１ｃ１ｄに差し込んだ後に、他の突起３０Ｂを基端側壁面２１ｃｂに沿って当接させながら、蓋部材２３を第１凹部２１ａの内側に嵌め込ませることによって、長手軸２ａ方向における基台部２１の表面における蓋部材２３の位置決めが行われる。 Positioning of the lid member 23 with respect to the base portion 21 in the circumferential direction orthogonal to the longitudinal axis 2a is performed by bringing the contact surface 23b into contact with the opening forming surface 21b as described above. Therefore, in the present embodiment, when the lid member 23 is adhered to the base portion 21, the operator abuts the contact surface 23b on the opening forming surface 21b, inserts the protrusion 30A into the recess 21c1d, and then inserts the protrusion 30A into the recess 21c1d. The lid member 23 is fitted inside the first recess 21a while the protrusion 30B of the above is brought into contact with the base end side wall surface 21cc, so that the lid member 23 is positioned on the surface of the base portion 21 in the direction of the longitudinal axis 2a. Is done.
　またこのとき、蓋部材２３と当該蓋部材２３の周囲を囲う壁面部２１ｃとの間には、溝状の隙間２７が生じている。この蓋部材２３の周囲に生じた隙間２７は、蓋部材２３の当接面２３ｂの外周に沿って途切れることなく連続している。 At this time, a groove-shaped gap 27 is formed between the lid member 23 and the wall surface portion 21c surrounding the lid member 23. The gap 27 generated around the lid member 23 is continuous along the outer circumference of the contact surface 23b of the lid member 23 without interruption.
　そして、図６に示すように、蓋部材２３と壁面部２１ｃとの間に生じた隙間２７内に、硬化前の固定用樹脂２６を流し込み、その後に固定用樹脂２６を硬化させることによって、基台部２１に蓋部材２３が接着固定される。ここで、本実施形態では、固定用樹脂２６を隙間無く蓋部材２３の当接面２３ｂの外周に沿って途切れることなく配置することができるため、蓋部材２３の基台部２１への固定を確実かつ強固に行うことができる。固定用樹脂２６を隙間２７に流し込むとき、凹部２１ｃ１ｄの上面２１ａ１と第１突出部３０Ａ１の外側面３０Ａ１ｂとが当接して係合しているため、蓋部材２３が基台部２１から脱落しない。よって、固定用樹脂２６の流し込みの作業性がよい。 Then, as shown in FIG. 6, the fixing resin 26 before curing is poured into the gap 27 formed between the lid member 23 and the wall surface portion 21c, and then the fixing resin 26 is cured to form a base. The lid member 23 is adhesively fixed to the base portion 21. Here, in the present embodiment, since the fixing resin 26 can be arranged without a gap along the outer circumference of the contact surface 23b of the lid member 23 without interruption, the lid member 23 can be fixed to the base portion 21. It can be done reliably and firmly. When the fixing resin 26 is poured into the gap 27, the upper surface 21a1 of the recess 21c1d and the outer surface 30A1b of the first protruding portion 30A1 are in contact with each other and are engaged with each other, so that the lid member 23 does not fall off from the base portion 21. Therefore, the workability of pouring the fixing resin 26 is good.
　また、本実施形態では、図７および図１１に示すように、蓋部材２３の当接面２３ｂと側面２３ｄとが交差する角の一部に、当該角を切り欠いた面取り部２３ｅが形成されている。また、この面取り部２３ｅが形成された側面２３ｄに対向する壁面部２１ｃには、切り欠き２１ｅが形成されている。面取り部２３ｅと開口形成面２１ｂとの間の隙間には、例えば内視鏡１００のメンテナンス時において蓋部材２３を基台部２１から取り外す際に、工具を差し込むことができる。 Further, in the present embodiment, as shown in FIGS. 7 and 11, a chamfered portion 23e having the corner cut out is formed at a part of the corner where the contact surface 23b and the side surface 23d of the lid member 23 intersect. ing. Further, a notch 21e is formed in the wall surface portion 21c facing the side surface 23d in which the chamfered portion 23e is formed. A tool can be inserted into the gap between the chamfered portion 23e and the opening forming surface 21b, for example, when the lid member 23 is removed from the base portion 21 during maintenance of the endoscope 100.
　次に、収容空間２２内に配設される可動部材５１について説明する。 Next, the movable member 51 arranged in the accommodation space 22 will be described.
　可動部材５１は、図５、図６および図１０に示すように、第１凹部２１ａ内において基台部２１に対して移動可能なように、基台部２１によって支持されている。具体的には、基台部２１には、第１凹部２１ａの底面から起上台収容空間２０ｄまで貫通する軸受２８が形成されている。軸受２８は、可動部材５１に固定された軸部５１ａを回動可能に支持する。可動部材５１は、第１凹部２１ａ内において、軸部５１ａから軸部５１ａに直交する方向に延出するレバー５１ｂを備える。したがって、レバー５１ｂは、第１凹部２１ａ内において、軸部５１ａの回動軸周りに揺動する。 As shown in FIGS. 5, 6 and 10, the movable member 51 is supported by the base portion 21 so as to be movable with respect to the base portion 21 in the first recess 21a. Specifically, the base portion 21 is formed with a bearing 28 that penetrates from the bottom surface of the first recess 21a to the riser accommodating space 20d. The bearing 28 rotatably supports the shaft portion 51a fixed to the movable member 51. The movable member 51 includes a lever 51b extending from the shaft portion 51a in a direction orthogonal to the shaft portion 51a in the first recess 21a. Therefore, the lever 51b swings around the rotation shaft of the shaft portion 51a in the first recess 21a.
　本実施形態では、可動部材５１の回動軸は、Ｘ軸に略平行である。したがって、レバー５１ｂは、第１凹部２１ａ（収容空間２２）内において、概ね長手軸２ａに沿う方向に移動する。 In this embodiment, the rotation axis of the movable member 51 is substantially parallel to the X axis. Therefore, the lever 51b moves in the first recess 21a (accommodation space 22) in a direction substantially along the longitudinal axis 2a.
　レバー５１ｂには、軸部５１ａから所定の距離だけ離れた位置において、起上台操作ワイヤ１８の先端が接続されている。起上台操作ワイヤ１８は、第１凹部２１ａの側面から基端方向Ｂに向かって基台部２１および基部２０ａを貫通する貫通孔２１ｄ内に挿通されている。なお、本実施形態では、貫通孔２１ｄ内には、起上台操作ワイヤ１８を導く案内パイプ２９が挿入されている。案内パイプ２９は、硬質な管状の部材である。起上台操作ワイヤ１８は、案内パイプ２９内に挿通されている。 The tip of the riser operating wire 18 is connected to the lever 51b at a position separated from the shaft portion 51a by a predetermined distance. The raising base operation wire 18 is inserted into a through hole 21d penetrating the base portion 21 and the base portion 20a from the side surface of the first recess 21a toward the base end direction B. In this embodiment, a guide pipe 29 for guiding the riser operating wire 18 is inserted in the through hole 21d. The guide pipe 29 is a rigid tubular member. The riser operating wire 18 is inserted into the guide pipe 29.
　前述のように、起上台操作ワイヤ１８は、起上台操作レバー１４の揺動に応じて、長手軸２ａに沿う方向に進退移動する。したがって、レバー５１ｂは、起上台操作レバー１４の揺動に応じて回動軸周りに揺動する。 As described above, the riser operating wire 18 moves forward and backward in the direction along the longitudinal axis 2a in response to the swing of the riser operation lever 14. Therefore, the lever 51b swings around the rotation axis in response to the swing of the riser operating lever 14.
　軸部５１ａは、起上台収容空間２０ｄ内に延出しており、軸部５１ａの起上台収容空間２０ｄ内に延出した部分には起上台５０が固定されている。したがって、起上台５０は、図８に示すように、可動部材５１とともに軸部５１ａの回動軸周りに揺動する。すなわち、起上台５０は、起上台操作レバー１４の揺動に応じて回動軸周りに揺動する。 The shaft portion 51a extends into the riser accommodating space 20d, and the riser 50 is fixed to the portion extending into the riser accommodating space 20d of the shaft portion 51a. Therefore, as shown in FIG. 8, the raising table 50 swings around the rotation axis of the shaft portion 51a together with the movable member 51. That is, the riser 50 swings around the rotation axis in response to the swing of the riser operating lever 14.
　起上台５０は、軸部５１ａから一方向に延出する舌状の部材である。起上台収容空間２０ｄの起上台５０の基端方向Ｂ側には、処置具チャンネルチューブ１７が開口している。起上台５０の揺動に伴い、処置具チャンネルチューブ１７から突出する処置具の角度が変化する。 The raising table 50 is a tongue-shaped member extending in one direction from the shaft portion 51a. A treatment tool channel tube 17 is opened on the base end direction B side of the riser stand 50 in the riser stand accommodation space 20d. As the raising table 50 swings, the angle of the treatment tool protruding from the treatment tool channel tube 17 changes.
　可動部材５１のレバー５１ｂは、第１凹部２１ａの開口から開口形成面２１ｂよりも一部が突出している。すなわち、可動部材５１の一部は、蓋部材２３に形成された第２凹部２３ａ内にまで突出している。 A part of the lever 51b of the movable member 51 protrudes from the opening forming surface 21b from the opening of the first recess 21a. That is, a part of the movable member 51 projects into the second recess 23a formed in the lid member 23.
　すなわち、本実施形態では、収容空間２２内において移動する可動部材５１は、基台部２１と蓋部材２３の合わせ面に略平行に移動するよう配置されており、かつ可動部材５１の一部は、第１凹部２１ａから基台部２１と蓋部材２３の合わせ面である開口形成面２１ｂ（当接面２３ｂ）を超えて第２凹部２３ａ内にまで突出している。したがって、基台部２１と蓋部材２３の合わせ面に平行な方向から見た場合（例えば図６の視線方向から見た場合）、可動部材５１は、基台部２１と蓋部材２３の合わせ面と重なっている。 That is, in the present embodiment, the movable member 51 that moves in the accommodation space 22 is arranged so as to move substantially parallel to the mating surface of the base portion 21 and the lid member 23, and a part of the movable member 51 is arranged. The first recess 21a projects beyond the opening forming surface 21b (contact surface 23b), which is the mating surface of the base portion 21 and the lid member 23, into the second recess 23a. Therefore, when viewed from a direction parallel to the mating surface of the base portion 21 and the lid member 23 (for example, when viewed from the line-of-sight direction of FIG. 6), the movable member 51 is the mating surface of the base portion 21 and the lid member 23. It overlaps with.
　次に、収容空間２２内における可動部材５１の移動範囲を定める構成について説明する。 Next, a configuration for determining the moving range of the movable member 51 in the accommodation space 22 will be described.
　収容空間２２内における可動部材５１の移動範囲の両端のうちの少なくとも一方は、可動部材５１が収容空間２２の側壁の一部である規制部２２ａに当接する位置によって定められている。 At least one of both ends of the moving range of the movable member 51 in the accommodating space 22 is determined by the position where the movable member 51 abuts on the regulating portion 22a which is a part of the side wall of the accommodating space 22.
　具体的に、本実施形態では、可動部材５１の移動範囲のうちの先端方向Ａ側の端は、可動部材５１が第１凹部２１ａの側壁の一部に設けられた規制部２２ａに当接する位置である。図６および図１０は、可動部材５１が移動範囲の先端方向Ａ側の端に位置し、規制部２２ａに当接している状態を示している。 Specifically, in the present embodiment, the end of the moving range of the movable member 51 on the tip direction A side is a position where the movable member 51 abuts on the regulating portion 22a provided on a part of the side wall of the first recess 21a. Is. 6 and 10 show a state in which the movable member 51 is located at the end of the moving range on the tip direction A side and is in contact with the regulating portion 22a.
　前述のように、基台部２１と蓋部材２３の合わせ面に平行な方向から見た場合において、可動部材５１は、基台部２１と蓋部材２３の合わせ面と重なった状態で収容空間２２内を移動する。このため、第１凹部２１ａの側壁に設けられた規制部２２ａは、収容空間２２内において先端方向Ａに向かって移動する可動部材５１に、第２凹部２３ａの側壁よりも先に当接するために、第２凹部２３ａの側壁よりも基端方向Ｂ側に突出している。 As described above, when viewed from a direction parallel to the mating surface of the base portion 21 and the lid member 23, the movable member 51 is in a state of overlapping the mating surface of the base portion 21 and the lid member 23, and the accommodation space 22 Move inside. Therefore, the restricting portion 22a provided on the side wall of the first recess 21a abuts on the movable member 51 moving toward the tip direction A in the accommodation space 22 before the side wall of the second recess 23a. , It protrudes from the side wall of the second recess 23a toward the base end direction B side.
　すなわち、第２凹部２３ａの長手軸２ａ方向における開口幅は、第１凹部２１ａの開口幅よりも広く、第２凹部２３ａの側壁は、規制部２２ａに当接した状態の可動部材５１から長手軸２ａ方向に離間している。 That is, the opening width of the second recess 23a in the longitudinal axis 2a direction is wider than the opening width of the first recess 21a, and the side wall of the second recess 23a is the longitudinal axis from the movable member 51 in a state of being in contact with the regulating portion 22a. It is separated in the 2a direction.
　本実施形態のように、可動部材５１を支持する軸受２８と可動部材５１の移動範囲を定める規制部２２ａを同一の部材である基台部２１に設けることによって、可動部材５１の移動範囲の精度を向上させることができる。なお、規制部２２ａは、蓋部材２３（第２凹部２３ａの側壁）に設けられてもよい。 As in the present embodiment, the bearing 28 that supports the movable member 51 and the regulating portion 22a that defines the moving range of the movable member 51 are provided on the base portion 21 that is the same member, so that the accuracy of the moving range of the movable member 51 is accurate. Can be improved. The regulating portion 22a may be provided on the lid member 23 (side wall of the second recess 23a).
　一方、可動部材５１の移動範囲のうちの基端方向Ｂ側の端は、可動部材５１に固定された起上台５０が、起上台収容空間２０ｄ内に突出するストッパ２０ｋに当接する位置である。ストッパ２０ｋは、図５および図８に示されている。図８は、起上台５０がストッパ２０ｋに当接している状態を示している。起上台収容空間２０ｄ内に、起上台５０に直接当接するストッパ２０ｋを設けることによって、可動部材５１と起上台５０との固定位置のばらつきに関わらず、起上台５０の位置決めを行うことができる。 On the other hand, the end of the movable member 51 on the base end direction B side is a position where the riser 50 fixed to the movable member 51 comes into contact with the stopper 20k protruding into the riser accommodation space 20d. The stopper 20k is shown in FIGS. 5 and 8. FIG. 8 shows a state in which the riser 50 is in contact with the stopper 20k. By providing the stopper 20k that directly contacts the riser 50 in the riser accommodation space 20d, the riser 50 can be positioned regardless of the variation in the fixed positions of the movable member 51 and the riser 50.
　以上に説明したように、本実施形態の内視鏡１００は、被検体に挿入される挿入部２に、可動部材５１を収容する収容空間２２を有している。そして、収容空間２２は、挿入部２に設けられた基台部２１に形成された第１凹部２１ａと、基台部２１に接着固定される蓋部材２３に形成された第２凹部２３ａとによって構成されている。 As described above, the endoscope 100 of the present embodiment has a storage space 22 for accommodating the movable member 51 in the insertion portion 2 inserted into the subject. The accommodation space 22 is formed by a first recess 21a formed in the base portion 21 provided in the insertion portion 2 and a second recess 23a formed in the lid member 23 adhesively fixed to the base portion 21. It is configured.
　本実施形態では、蓋部材２３に、側面２３ｄから突出し、かつ側面２３ｄの肉厚よりも薄い突起３０Ａと他の突起３０Ｂを設けている。当該突起３０Ａの一部が基台部２１に設けられた壁面部２１ｃの凹部２１ｃ１ｄに入り込み、かつ、第２突出部３０Ａ２の先端面３０Ａ１ａが先端側壁面２１ｃａに当接することによって、長手軸２ａ方向における基台部２１に対する蓋部材２３の位置決めを行うとともに、側面２３ｄと壁面部２１ｃとの間に固定用樹脂２６を流し込むための所定の幅の溝状の隙間２７を形成する。 In the present embodiment, the lid member 23 is provided with a protrusion 30A and another protrusion 30B that protrude from the side surface 23d and are thinner than the wall thickness of the side surface 23d. A part of the protrusion 30A enters the recess 21c1d of the wall surface portion 21c provided on the base portion 21, and the tip surface 30A1a of the second protrusion 30A2 abuts on the tip side wall surface 21ca in the direction of the longitudinal axis 2a. In addition to positioning the lid member 23 with respect to the base portion 21, a groove-shaped gap 27 having a predetermined width for pouring the fixing resin 26 into the side surface portion 23d and the wall surface portion 21c is formed.
　なお、第２突出部３０Ａ２の先端面３０Ａ２ａを先端側壁面２１ｃａには当接しないようにして、第１突出部３０Ａ１の先端面３０Ａ１ａを凹部２１ｃ１ｄの底面２１ａ２に当接させることによって、長手軸２ａ方向における基台部２１に対する蓋部材２３の位置決めを行うようにしてもよい。 The front end surface 30A2a of the second protrusion 30A2 is not in contact with the tip side wall surface 21ca, and the tip surface 30A1a of the first protrusion 30A1 is brought into contact with the bottom surface 21a2 of the recess 21c1d. The lid member 23 may be positioned with respect to the base portion 21 in the direction.
　突起３０Ａと他の突起３０Ｂは、側面２３ｄの一部から突出するのみであり、かつ側面２３ｄよりも薄い部位であることから、溝状の隙間２７は、側面２３ｄに沿って途切れることなく連続して延在する。よって本実施形態では、硬化前の固定用樹脂２６を、蓋部材２３の外周である側面２３ｄの全体に行き渡らせることができる。 Since the protrusion 30A and the other protrusion 30B only protrude from a part of the side surface 23d and are thinner than the side surface 23d, the groove-shaped gap 27 is continuous along the side surface 23d without interruption. It is extended. Therefore, in the present embodiment, the fixing resin 26 before curing can be spread over the entire side surface 23d which is the outer circumference of the lid member 23.
　したがって本実施形態の内視鏡１００では、作業者は、組み立て時において、突起３０Ａの一部を先端側壁面２１ｃａの凹部２１ｃ１ｄに差し込んだ後に、他の突起３０Ｂを基端側壁面２１ｃｂに沿って当接させながら、蓋部材２３を第１凹部２１ａに入り込ませる。その後に、隙間２７内に流し込んだ固定用樹脂２６を硬化させることによって、基台部２１に対して蓋部材２３を精度よく位置決めしながら、蓋部材２３を強固に固定することができる。本実施形態では、先端部材２０と蓋部材２３をステンレスなどの金属にて形成しているが、これら先端部２０と蓋部材２３をプラスチックなどの硬質の樹脂で形成しても良い。先端部２０と蓋部材２３との間を上述した実施形態と同様に固定用樹脂２６で接着しても良く、また、固定用樹脂を使用する代わりに先端部２０と蓋部材２３との間、例えば溝状の隙間２７を超音波による溶着技術などを用いて溶着しても良い。 Therefore, in the endoscope 100 of the present embodiment, at the time of assembly, the operator inserts a part of the protrusion 30A into the recess 21c1d of the tip side wall surface 21ca, and then inserts another protrusion 30B along the base end side wall surface 21cc. The lid member 23 is inserted into the first recess 21a while being brought into contact with the lid member 23. After that, by curing the fixing resin 26 that has been poured into the gap 27, the lid member 23 can be firmly fixed while accurately positioning the lid member 23 with respect to the base portion 21. In the present embodiment, the tip member 20 and the lid member 23 are made of a metal such as stainless steel, but the tip portion 20 and the lid member 23 may be made of a hard resin such as plastic. The tip portion 20 and the lid member 23 may be bonded with the fixing resin 26 in the same manner as in the above-described embodiment, and instead of using the fixing resin, between the tip portion 20 and the lid member 23, For example, the groove-shaped gap 27 may be welded by using an ultrasonic welding technique or the like.
　以上に説明したように、本実施形態の内視鏡１００によれば、挿入部先端に配置された硬質部材に蓋部材を固定する際の作業性を向上させた内視鏡を提供することができる。 As described above, according to the endoscope 100 of the present embodiment, it is possible to provide an endoscope having improved workability when fixing the lid member to the hard member arranged at the tip of the insertion portion. it can.
　次に、上述した実施形態の変形例について説明する。
（変形例１）
　上述した実施形態では、蓋部材２３に突起３０Ａが設けられ、先端部材２０の第１凹部２１ａの壁面部２１ｃに凹部２１ｃ１ｄが形成されているが、蓋部材２３に凹部を設け、壁面部２１ｃに突起を設けてもよい。 Next, a modified example of the above-described embodiment will be described.
(Modification example 1)
In the above-described embodiment, the lid member 23 is provided with the protrusion 30A, and the concave portion 21c1d is formed on the wall surface portion 21c of the first concave portion 21a of the tip member 20, but the lid member 23 is provided with the concave portion on the wall surface portion 21c. A protrusion may be provided.
　図１６は、本変形例１に関わる先端部の断面図である。先端部材２０の先端側壁面２１ｃａには、上述した実施形態における突起３０Ａに相当する突起３０Ｃが設けられている。突起３０Ｃは、上述した突起３０Ａと同様の形状を有する。すなわち、突起３０Ｃは、第１突出部３０Ｃ１と、第１突出部３０Ｃ１よりも突出量が少ない第２突出部３０Ｃ２を有する。第１突出部３０Ｃ１と第２突出部３０Ｃ２は、それぞれ上述した第１突出部３０Ａ１と第２突出部３０Ａ２と同じ形状を有している。 FIG. 16 is a cross-sectional view of the tip portion according to the present modification 1. The tip side wall surface 21ca of the tip member 20 is provided with a protrusion 30C corresponding to the protrusion 30A in the above-described embodiment. The protrusion 30C has the same shape as the protrusion 30A described above. That is, the protrusion 30C has a first protrusion 30C1 and a second protrusion 30C2 having a smaller protrusion amount than the first protrusion 30C1. The first protruding portion 30C1 and the second protruding portion 30C2 have the same shape as the first protruding portion 30A1 and the second protruding portion 30A2 described above, respectively.
　蓋部材２３の側面２３ｄには、第１凹部２３ｇが形成されている。第１凹部２３ｇは、上述した凹部２１ａと同じ形状を有しており、突起３０Ｃが第１凹部２３ｇに嵌入する。突起３０Ｃは、蓋部材２３の側面２３ｄに向かって突出する。図１６では、第１突出部３０Ｃ１の内側面（先端部材２０の外側とは反対側に形成された面）３０Ｃ１ａが第１凹部２３ｇの下面（先端部材２０の外側とは反対側に形成された面）２３ｇａに当接しているが、第１突出部３０Ｃ１の先端面３０Ｃ１ｂと第１凹部２３ｇの底面２３ｇｂは当接しておらず、第１突出部３０Ｃ１の外側面３０Ｃ１ｃと第１凹部２３ｇの上面２３ｇｃも当接していない。 A first recess 23g is formed on the side surface 23d of the lid member 23. The first recess 23g has the same shape as the recess 21a described above, and the protrusion 30C fits into the first recess 23g. The protrusion 30C projects toward the side surface 23d of the lid member 23. In FIG. 16, the inner side surface (the surface formed on the side opposite to the outside of the tip member 20) 30C1a of the first protrusion 30C1 is formed on the lower surface (the side opposite to the outside of the tip member 20) of the first recess 23g. Surface) Although it is in contact with 23ga, the tip surface 30C1b of the first protrusion 30C1 and the bottom surface 23gb of the first recess 23g are not in contact, and the outer surface 30C1c of the first protrusion 30C1 and the upper surface of the first recess 23g are in contact. No 23 gc is in contact.
　第１突出部３０Ｃ１の内側面３０Ｃ１ａが第１凹部２３ｇの下面２３ｇａに当接することによって、外表面２３ｆの方向における蓋部材２３の位置決めがなされる。よって、また、第２突出部３０Ｃ２の先端面３０Ｃ２ａが先端側壁面２１ｃａに当接することによって、長手軸２ａ方向における蓋部材２３の位置決めがなされる。 The inner side surface 30C1a of the first protrusion 30C1 abuts on the lower surface 23ga of the first recess 23g, so that the lid member 23 is positioned in the direction of the outer surface 23f. Therefore, the tip surface 30C2a of the second protruding portion 30C2 comes into contact with the tip side wall surface 21ca, so that the lid member 23 is positioned in the longitudinal axis 2a direction.
　本変形例１によっても、上述した実施形態と同様の効果を生じる。
（変形例２）
　上述した実施形態では、蓋部材２３は他の突起３０Ｂを有し、この他の突起３０Ｂが基端側壁面２１ｃｂに当接しているが、壁面部２１ｃに斜面形成部を設け、蓋部材２３は突起を有していなくてもよい。 The present modification 1 also produces the same effect as that of the above-described embodiment.
(Modification 2)
In the above-described embodiment, the lid member 23 has another protrusion 30B, and the other protrusion 30B is in contact with the base end side wall surface 21cc. However, the wall surface portion 21c is provided with a slope forming portion, and the lid member 23 is provided. It does not have to have a protrusion.
　図１７は、本変形例２に関わる先端部材２０の基端側壁面２１ｃｂと、蓋部材２３の当接状態を示した断面図である。図１７に示すように、先端部材２０の基端側壁面２１ｃｂには、その開口縁部に斜面形成部２１ｃｂｘが形成されている。斜面形成部２１ｃｂｘは、開口形成面２１ｂの、挿入軸に沿った基端側に向かって傾斜した傾斜面からなる。 FIG. 17 is a cross-sectional view showing a contact state between the base end side wall surface 21 kb of the tip member 20 and the lid member 23 according to the present modification 2. As shown in FIG. 17, a slope forming portion 21ccbx is formed on the opening edge portion of the base end side wall surface 21cc of the tip member 20. The slope forming portion 21cbx is formed of an inclined surface of the opening forming surface 21b that is inclined toward the base end side along the insertion axis.
　よって変形例２においては、突起３０Ａが凹部２１ｃ１ｄに差し込まれた後に、蓋部材２３の下端縁２３ｉが斜面形成部２１ｃｂｘの傾斜面２１ｃｂｘ１に沿って当接しながら移動し、蓋部材２３は、第１凹部２１ａの内側に嵌め込まれる。 Therefore, in the second modification, after the protrusion 30A is inserted into the recess 21c1d, the lower end edge 23i of the lid member 23 moves while abutting along the inclined surface 21cbx1 of the slope forming portion 21cbx, and the lid member 23 moves along the inclined surface 21cbx1. It is fitted inside the recess 21a.
　本変形例２によっても、上述した実施形態と同様の効果を生じる。
（変形例３）
　上述した実施形態では、突起３０Ａは、蓋部材２３の当接面２３ｂおよび外表面２３ｆから厚さ方向に離間して設けられているが、当接面２３ｂからは離間していなくてもよい。 The second modification also produces the same effect as that of the above-described embodiment.
(Modification example 3)
In the above-described embodiment, the protrusion 30A is provided so as to be separated from the contact surface 23b and the outer surface 23f of the lid member 23 in the thickness direction, but may not be separated from the contact surface 23b.
　図１８は、上述した実施形態における突起３０Ａに相当する、本変形例３に関わる突起３０Ｄの一部が凹部２１ｃ１ｄに差し込まれた状態を示す断面図である。 FIG. 18 is a cross-sectional view showing a state in which a part of the protrusion 30D according to the third modification, which corresponds to the protrusion 30A in the above-described embodiment, is inserted into the recess 21c1d.
　図１８に示すように、蓋部材２３の突起３０Ｄは、第１突出部３０Ｄ１と第２突出部３０Ｄ２を有する。第１突出部３０Ｄ１と第２突出部３０Ｄ２は、それぞれ、上述した第１突出部３０Ａ１と第２突出部３０Ａ２と同様の形状を有しているが、第１突出部３０Ｄ１の下面（開口形成面２１ｂ側の面）には、カット面３０Ｄ１ａが形成されている。 As shown in FIG. 18, the protrusion 30D of the lid member 23 has a first protrusion 30D1 and a second protrusion 30D2. The first protruding portion 30D1 and the second protruding portion 30D2 have the same shapes as the first protruding portion 30A1 and the second protruding portion 30A2 described above, respectively, but the lower surface (opening forming surface) of the first protruding portion 30D1. A cut surface 30D1a is formed on the surface on the 21b side).
　先端部材２０の先端側壁面２１ｃａには、凹部２１ｃ２ｄが形成されている。凹部２１ｃ２ｄは、凹部２１ｃ２ｄの下面２１ｃ２ｄ１が開口形成面２１ｂと面一になるように、先端側壁面２１ｃａに形成されている。凹部２１ｃ２ｄは、上述した凹部２１ｃ１ｄと同じ形状を有する。 A recess 21c2d is formed on the tip side wall surface 21ca of the tip member 20. The recess 21c2d is formed on the tip side wall surface 21ca so that the lower surface 21c2d1 of the recess 21c2d is flush with the opening forming surface 21b. The recess 21c2d has the same shape as the recess 21c1d described above.
　また、長手軸２ａ方向における蓋部材２３の位置決めは、第１突出部３０Ｄ１の先端面３０Ｄ１ｂが凹部２１ｃ２ｄの底面２１ｃ２ｄ２に当接することによってなされている。 Further, the positioning of the lid member 23 in the direction of the longitudinal axis 2a is performed by the tip surface 30D1b of the first protruding portion 30D1 coming into contact with the bottom surface 21c2d2 of the recess 21c2d.
　なお、第１突出部３０Ｄ１の先端面３０Ｄ１ｂを凹部２１ｃ２ｄの底面２１ｃ２ｄ２に当接させないで、第２突出部３０Ｄ２の先端面３０Ｄ２ａを先端側壁面２１ｃａに当接させることによって、長手軸２ａ方向における蓋部材２３の位置決めを行うようにしてもよい。図１９は、第２突出部３０Ｄ２の先端面３０Ｄ２ａが先端側壁面２１ｃａに当接する場合を示す断面図である。図１９の場合、長手軸２ａ方向に直交する方向における凹部２１ｃ２ｄの高さが大きいため、カット面が第１突出部３０Ｄ１の下面には形成されていないが、図１８と同様に、第１の突出部３０Ｄ１の下面にカット面を設けてもよい。 The tip surface 30D1b of the first protruding portion 30D1 is not brought into contact with the bottom surface 21c2d2 of the recess 21c2d, but the tip surface 30D2a of the second protruding portion 30D2 is brought into contact with the tip side wall surface 21ca to cover the lid in the longitudinal axis 2a direction. The member 23 may be positioned. FIG. 19 is a cross-sectional view showing a case where the tip surface 30D2a of the second protrusion 30D2 abuts on the tip side wall surface 21ca. In the case of FIG. 19, since the height of the recess 21c2d in the direction orthogonal to the longitudinal axis 2a direction is large, the cut surface is not formed on the lower surface of the first protrusion 30D1, but as in FIG. 18, the first A cut surface may be provided on the lower surface of the protruding portion 30D1.
　本変形例３によっても、上述した実施形態と同様の効果を生じる。
（変形例４）
　上述した変形例１では、突起３０Ｃは、第１突出部３０Ｃ１と第２突出部３０Ｃ２の二つの突出部を有しているが、二つの突出部を有していなくてもよい。 The present modification 3 also produces the same effect as that of the above-described embodiment.
(Modification example 4)
In the above-described modification 1, the protrusion 30C has two protrusions, a first protrusion 30C1 and a second protrusion 30C2, but the protrusion 30C does not have to have the two protrusions.
　図２０は、上述した実施形態における突起３０Ａに相当する、本変形例４に関わる突起３０Ｅが凹部２３ｇに入り込んだ状態を示す断面図である。図２０に示すように、突起３０Ｅは、二つの突出部を有していない。また、蓋部材２３の側面２３ｄの下部にカット面２３ｄ３が形成されている。 FIG. 20 is a cross-sectional view showing a state in which the protrusion 30E according to the present modification 4, which corresponds to the protrusion 30A in the above-described embodiment, has entered the recess 23g. As shown in FIG. 20, the protrusion 30E does not have two protrusions. Further, a cut surface 23d3 is formed below the side surface 23d of the lid member 23.
　突起３０Ｅは、蓋部材２３に設けられた第１凹部２３ｇに入り込んだときに、突起３０Ｅの先端面３０Ｅａが第１凹部２３ｇの底面２３ｄ１に当接することによって、長手軸２ａ方向における蓋部材２３の位置決めを行うことができる。なお、突起３０Ｅは、蓋部材２３に設けられた第１凹部２３ｇに入り込んだときに、先端側壁面２１ｃａが蓋部材２３の側面２３ｄの下側部分に当接することによって、長手軸２ａ方向における蓋部材２３の位置決めを行うようにしてもよい。 When the protrusion 30E enters the first recess 23g provided in the lid member 23, the tip surface 30Ea of the protrusion 30E comes into contact with the bottom surface 23d1 of the first recess 23g, so that the lid member 23 in the longitudinal axis 2a direction Positioning can be performed. When the protrusion 30E enters the first recess 23g provided in the lid member 23, the tip side wall surface 21ca comes into contact with the lower portion of the side surface 23d of the lid member 23, so that the lid in the longitudinal axis 2a direction is formed. The member 23 may be positioned.
　なお、図２０においては、蓋部材２３にはカット面２３ｄ３が設けられているが、蓋部材２３はこのようなカット面を有していなくてもよい。 Although the lid member 23 is provided with a cut surface 23d3 in FIG. 20, the lid member 23 does not have to have such a cut surface.
　図２１は、本変形例４に関わる、蓋部材２３がカット面を有さない場合の突起３０Ｅが凹部２３ｇ１に入り込んだ状態を示す断面図である。図２１に示すように、蓋部材２３に設けられた凹部２３ｇ１の開口部が広いため、突起３０Ｅは凹部２３ｇ１に入れ易い。 FIG. 21 is a cross-sectional view showing a state in which the protrusion 30E has entered the recess 23g1 when the lid member 23 does not have a cut surface, which is related to the present modification 4. As shown in FIG. 21, since the opening of the recess 23g1 provided in the lid member 23 is wide, the protrusion 30E can be easily inserted into the recess 23g1.
　本変形例４によっても、上述した実施形態と同様の効果を生じる。 The present modification 4 also produces the same effect as that of the above-described embodiment.
　以上のように、上述した実施形態及び各変形例によれば、挿入部先端に配置された硬質部材に蓋部材を固定する際の作業性を向上させた内視鏡を提供することができる。 As described above, according to the above-described embodiment and each modification, it is possible to provide an endoscope having improved workability when fixing the lid member to the hard member arranged at the tip of the insertion portion.
　本発明は、上述した実施形態に限定されるものではなく、本発明の要旨を変えない範囲において、種々の変更、改変等が可能である。 The present invention is not limited to the above-described embodiment, and various modifications, modifications, and the like can be made without changing the gist of the present invention.

Claims (12)

  1. 　内視鏡の挿入部先端に配置された硬質部材と、
    　前記硬質部材の一部を覆う蓋部材と、
    　前記硬質部材に設けられ、前記挿入部の長手軸に対し交差する方向に沿った平面を有する第１壁面と、
    　前記蓋部材に設けられ、前記蓋部材が前記硬質部材の一部を覆う際に前記第１壁面に対向する第２壁面と、
    　前記第１壁面と前記第２壁面の一方に設けられ、他方に向かって突出する突起と、
    　前記第１壁面と前記第２壁面の他方に設けられ、前記突起が嵌入する凹部と、
    を備えたことを特徴とする内視鏡。     A hard member placed at the tip of the insertion part of the endoscope,
    A lid member that covers a part of the hard member and
    A first wall surface provided on the hard member and having a plane along a direction intersecting the longitudinal axis of the insertion portion, and
    A second wall surface provided on the lid member and facing the first wall surface when the lid member covers a part of the hard member, and
    A protrusion provided on one of the first wall surface and the second wall surface and projecting toward the other,
    A recess provided on the other side of the first wall surface and the second wall surface into which the protrusion is fitted,
    An endoscope characterized by being equipped with.
  2. 　前記第１壁面は、前記硬質部材に設けられた窪みを囲う周縁面の一部である、請求項１に記載の内視鏡。 The endoscope according to claim 1, wherein the first wall surface is a part of a peripheral surface surrounding a recess provided in the hard member.
  3. 　前記周縁面における前記第１壁面と対向する壁面の少なくとも一部が、前記窪みの外側に向かって広がる傾斜面を有する、請求項２に記載の内視鏡。 The endoscope according to claim 2, wherein at least a part of the wall surface of the peripheral surface facing the first wall surface has an inclined surface extending toward the outside of the recess.
  4. 　前記第１壁面及び前記第２壁面は、前記長手軸の先端側もしくは基端側に形成された面である、請求項２に記載の内視鏡。 The endoscope according to claim 2, wherein the first wall surface and the second wall surface are surfaces formed on the distal end side or the proximal end side of the longitudinal axis.
  5. 　前記突起が前記蓋部材に設けられた場合、前記突起における前記硬質部材の外側に形成された面と前記凹部における前記硬質部材の外側に形成された面とが当接するよう形成された、請求項１に記載の内視鏡。 The claim that when the protrusion is provided on the lid member, the surface formed on the outside of the hard member in the protrusion and the surface formed on the outside of the hard member in the recess are in contact with each other. The endoscope according to 1.
  6. 　前記第１壁面と前記第２壁面の一方に、前記第１壁面と前記第２壁面の間隔を維持する位置決め用の突出部が設けられている、請求項１に記載の内視鏡。 The endoscope according to claim 1, wherein a positioning protrusion for maintaining a distance between the first wall surface and the second wall surface is provided on one of the first wall surface and the second wall surface.
  7. 　前記第２壁面は、ほぼ平板状に形成された前記蓋部材の周縁面の一部である、請求項１に記載の内視鏡。 The endoscope according to claim 1, wherein the second wall surface is a part of a peripheral surface of the lid member formed in a substantially flat plate shape.
  8. 　前記蓋部材の周縁面における前記第２壁面と対向する壁面の少なくとも一部が、前記硬質部材側に向かって広がる傾斜面を有する、請求項７に記載の内視鏡。 The endoscope according to claim 7, wherein at least a part of a wall surface facing the second wall surface on the peripheral surface of the lid member has an inclined surface that spreads toward the hard member side.
  9. 　前記第２壁面は、前記蓋部材における前記長手軸の先端側もしくは基端側に形成された面である、請求項７に記載の内視鏡。 The endoscope according to claim 7, wherein the second wall surface is a surface formed on the distal end side or the proximal end side of the longitudinal axis of the lid member.
  10. 　前記突起が前記硬質部材に設けられた場合、前記突起における前記硬質部材の外側とは反対側に形成された面と前記凹部における前記硬質部材の外側とは反対側に形成された面とが当接するよう形成された、請求項１に記載の内視鏡。 When the protrusion is provided on the hard member, the surface of the protrusion formed on the side opposite to the outside of the hard member and the surface of the recess formed on the side opposite to the outside of the hard member are in contact with each other. The endoscope according to claim 1, which is formed so as to be in contact with the endoscope.
  11. 　前記突起が前記硬質部材に設けられた場合、前記蓋部材において前記突起が設けられた側面とは反対側の面に設けられた他の突起を有する、請求項１に記載の内視鏡。 The endoscope according to claim 1, wherein when the protrusion is provided on the hard member, the lid member has another protrusion provided on a surface opposite to the side surface on which the protrusion is provided.
  12. 　前記他の突起における端面は、前記硬質部材側に向かって広がる傾斜面で形成される、請求項１１に記載の内視鏡。 The endoscope according to claim 11, wherein the end surface of the other protrusion is formed by an inclined surface extending toward the hard member side.
PCT/JP2019/045284 2019-11-19 2019-11-19 Endoscope WO2021100123A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2019/045284 WO2021100123A1 (en) 2019-11-19 2019-11-19 Endoscope
JP2021558077A JP7245357B2 (en) 2019-11-19 2019-11-19 Endoscope and method for manufacturing endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/045284 WO2021100123A1 (en) 2019-11-19 2019-11-19 Endoscope

Publications (1)

Publication Number Publication Date
WO2021100123A1 true WO2021100123A1 (en) 2021-05-27

Family

ID=75980445

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/045284 WO2021100123A1 (en) 2019-11-19 2019-11-19 Endoscope

Country Status (2)

Country Link
JP (1) JP7245357B2 (en)
WO (1) WO2021100123A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004141316A (en) * 2002-10-23 2004-05-20 Fuji Photo Optical Co Ltd Tip of side view type endoscope
JP2019511303A (en) * 2016-08-11 2019-04-25 デジタル エンドスコピー ゲーエムベーハー Endoscope head, endoscope and albaran lever holding member

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004141316A (en) * 2002-10-23 2004-05-20 Fuji Photo Optical Co Ltd Tip of side view type endoscope
JP2019511303A (en) * 2016-08-11 2019-04-25 デジタル エンドスコピー ゲーエムベーハー Endoscope head, endoscope and albaran lever holding member

Also Published As

Publication number Publication date
JPWO2021100123A1 (en) 2021-05-27
JP7245357B2 (en) 2023-03-23

Similar Documents

Publication Publication Date Title
JP7026807B2 (en) The tip of the endoscope, the endoscope insertion part, and the endoscope
US20130041223A1 (en) Endoscope
EP3158913B1 (en) Endoscope
JPWO2019150633A1 (en) Insert device
JP6848098B2 (en) Inserting device, tip member and lid member of inserting device
JP5881901B2 (en) Insertion device operation mechanism, insertion device
JP4422733B2 (en) Ultrasonic diagnostic equipment
JP7086015B2 (en) Endoscopic ultrasound
WO2021100123A1 (en) Endoscope
JP6905094B2 (en) Insert device
US20230000318A1 (en) Endoscope
US20210369086A1 (en) Distal end unit of endoscope, and endoscope
US20210369089A1 (en) Endoscope
JP2001046329A (en) Endoscope
JP6649044B2 (en) Ultrasonic endoscope and method of manufacturing ultrasonic endoscope
JP7459228B2 (en) Electronic module, electronic module manufacturing method, and endoscope
US11553894B2 (en) Ultrasonic endoscope
JP7246539B2 (en) Endoscope
WO2023017598A1 (en) Imaging unit and endoscope applying said imaging unit
JP4336943B2 (en) Endoscope operation section
JP6063732B2 (en) Endoscope
US20140107414A1 (en) Distal Tip Channel Ramp

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19952960

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021558077

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19952960

Country of ref document: EP

Kind code of ref document: A1